Yes I agree with that completely. For a city with more than 600 000 people, Brampton is truly lacking with mid-rise or high-rise buildings. I will be completely honest to say that I think that even Oakville (which has a third of Brampton's population) has more high rise buildings than Brampton. What Brampton has done is waste a lot of precious development space in new and upcoming communities. With the Uptown Core in Oakville aside, there are many mid-rise buildings being built along Dundas Street in general. There are currently mid-rise developments stretching from Neyegawa Boulevard all the way to Eighth Line. The layout of new Oakville communities is very smart and larger cities such as Brampton can really benefit from similar layouts. In North Oakville, you have mid-rise buildings lining up along Dundas Street. Then, you have townhouses behind these mid-rise buildings. Finally, the single detached homes and semi-detached homes are further back. Furthermore, there are numerous Work/Live units in North Oakville. This really helps the local economy, not only on a municipal level but in the community's whole. What is happening in Oakville is a creation of aesthetic neighbourhoods that function well and will continue to function well in the future. In Brampton, that is simply not happening. You have townhouses all over the place. Additionally, there are so many detached homes that take up so much space. Around Mount Pleasant GO, I agree with what others have said saying that townhouses are helping increase transit ridership. However, it is not as effective as mid-rise and high-rise developments. Brampton has a major advantage over North Oakville, it has GO Train service. Although North Oakville is easily connected to Oakville GO by transit, Mount Pleasant still has a notable advantage. What Brampton is doing is that they are not taking advantage of the amazing resource that they have. Townhouses and Semi-Detached Homes may solve some problems but they are certainly not going to work in years to come. Also, I think that mid-rise buildings work best around Mount Pleasant GO and will not be too hard to sell. People like the added convenience of being near a train station, however, not everybody likes the sound of trains passing by. Mid-Rise Buildings will be able to act as a buffer for the noise coming from the trains. Additionally, retail space can be added to the lower floors which would be beneficial for not only train commuters but also to the Mount Pleasant community. Everything aside, Brampton needs to step up their game.
Mt. Pleasant actually has several 3 storey mixed use buildings at the center of the community, as well as some 4 storey apartment buildings.
I think the advantage of Mt. Pleasant's model is that the phasing with somewhat lower densities allowed it to be built more quickly, and create a cohesive urban fabric relatively quickly. Meanwhile, with Uptown Oakville, you still have a bunch of big box stores with football field sized parking lots in the middle of the community ruining the urban fabric. It was that way two decades ago when the first homes started being built around Parkhaven Boulevard, and it will probably take 2-3 more decades before they're done being redeveloped into something more urban.
Meanwhile, with Mt. Pleasant, you went from farm fields to a nice vibrant little square surrounded by shops, a community centre and train station in just a couple years.
The downside with Mt. Pleasant is that I'm not sure how much of a plan there is to incrementally build up the place from here on out. There should have been a plan to build new higher density phases, for example, south of the GO station, and even to start replacing some of the townhouses and SFHs with midrises and highrises a few decades down the line. Having room for a grocery store, so that people walking home from the train station can pick a few things up for dinner would have been a great solution, and the way the areas around train stations eventually get built up in other parts of the world like in Japan.
Ultimately, your typical Brampton subdivision has somewhat limited potential for being urban. The best you can do is reduce auto-mode share from 85% to 75% or something, if you do everything right with the community's design... I think the problem with planning in the GTA is that there's not enough consideration given to location, even though people should know by now that location is a critical point. The better the location, the greater the potential to across jobs, dense housing and serve with transit.
For example, I think the potential for the area around Bloor GO Station is being squandered. Planning authorities should be looking at it as a great location for a potential secondary employment hub as Downtown starts to run out of space within walking distance of Union Station for new office buildings. You have the Bloor subway, Milton, Kitchener and Barrie lines all passing through there, and the potential for a new West-DRL subway and Bolton/Alliston line at some point in the future, and you could eventually through-run trains from the eastern GTA too. It's quite accessible to the executive class of North Toronto and extremely accessible to the executive class of Central Etobicoke/High Park, and very accessible to the professional class of densely populated West Toronto, as well as several large commercial and industrial properties that would be quite easy to redevelop into large office buildings.
If you compare to a place like Markham Centre, although both are served by rail transit, the're a huge difference in accessibility between being served by 4 lines (and possibly eventually 6+) and centrally located within the GTA vs 1 line, and on the edge of the GTA. I'm not saying don't build density in Markham Centre, if you do build some in York Region, that's one of the better spots, and it's better than building more sprawl, but I think as the economy is shifting away from industrial employment, which requires sprawled out employment lands in the suburbs, towards retail/institutional/office employment that can be much more compact, we should try to have as much of the new jobs, and residences of the people holding those jobs, be in the more transit friendly locations.