Problem is, all of the transit that you're alluding to are being currently being studied with no funding attached to them (with the exception of the Park Lawn GO station). In other words, they are in transit fantasy land until the city gets serious about funding them.The waterfront LRT is of this point in time being studied to be extended to parklawn, so there will be good transit here to support density. There is also a ferry option being studied as well as a GO station as you know.
The funny thing is, it's looking like the Waterfront East LRT is closer to being built at the point, compared to the Waterfront West LRT. But that's how things go in this city, build projects in areas that dont need rapid transit at this moment while areas which desperately need it continue to starve.