I must chuckle at the idea that Metrolinx take over all rapid transit in the region. It was/is an idea in PC platform. I might not trust them on transit but that's one idea I fully agree with.
Why do we have the current situation? Lack of fare and service integration. Metrolinx didn't create a true regional transit plan. It took a laundry list of local transit ideas and promised to fund them. A truly regional plan, for example, would never have had the Sheppard East LRT as a Phase 1 project.
A real regional plan would have had a full GO REX network as its backbone. A real regional transit agency would be managing the long-haul network including the subways and LRTs and leave the feeder buses and to the local authorities where service can be varied directly according to local ratepayer whims.
Instead of that kind of sound panning, we got MO2020. So no sympathies that Scarborough residents are asking for a subway and the province is considering the request. Had Metrolinx actually done its job, they'd be planning GO stations in Scarborough, and be on the verge of launching all-day GO service with full TTC fare and feeder service integration.
If Metrolinx just wants to act as cover to tax municipalities to fund the transit construction laundry list, it deserves its fate.