Are you suggesting that the 129, 130, 131, 169, 939, and other buses continue going all the way to Scarborough Centre, rather than just terminating at Sheppard East? I'd thinking that getting them off the bottleneck section of McCowan would benefit the service quality.
Ah, the Durham BRT ... which I don't even see listed in the Metrolinx quarterly reports anymore. I'd think they'd be better to stop that at UTSC, and then run express to Guildwood GO and/or Sheppard West via 401 HOV lanes. And I wonder how much the BRT and this LRT are reporting the same passengers on the segment from Line 2 to UTSC.
Ultimately I wouldn't be against a Line 4 extension from Sheppard East, under the 401 to Centennial College, the hospital at Scarbourgh/Ellesmere, and then UTSC. Though we are probably in next century fantasyland territory there.