Burlington has been over 10 years trying to get Halton to take over transit in their city. Halton has looked at merging all services in its Region, but has done nothing anything about it due to cost.
There is no service from Milton to Georgetown that should be by GO or Halton/Milton.
There are huge gaps in Halton and will remain missing until Metrolinx has full control over Halton that been part of their plan since 2007.
miWay ran service into Oakville along Dundas, but was cancel due to poor ridership. Metrolinx wants to run an BRT from Kipling Regional Hub to Burlington in its own ROW, but the ROW stops west of Hurontario under Mississauga Dundas plan with the backing of Metrolinx due to ridership. Oakville has had in their Master Transit Plan an BRT ROW running from Mississauga to Burlington close to 15 years, but can't get off the ground due very low density along Dundas then and now. If an BRT is to run along Dundas as plan, then it has to be a GO Transit Thing since it runs through 3 cities/town. If miWay was to do it, it would have to be subsidizes by Oakville and Burlington, with Burlington opposing it to cover full cost of miWay service since they don't like playing for Transit in their own city.
miWay runs over 10 routes into Toronto today using Islington at this time and will move to Kipling in Sept this year. Brampton runs service to Pearson From Bramalea Terminal as well on Dixie to the Transitway at Peak Time Only as well to Westwood Terminal. TTC service Westwood Terminal as well.
York Region runs buses to Finch Station as well Don Mills Station.
There should be a PEEL Transit System like other Regions, but both cities don't want it, especially Mississauga who wants out of Peel for a long time. When Peel was form, there was a plan for Peel Transit, but died during the formation of the Region and Mississauga.
These days, MP's, MPP's and their staff just file complaints in the junk file, with the odd ones willing to do something about a complaint on Transit. If its about cars, roads and highway, they will listen and do something about it.