Transfers aren't the end of the world when they are done right. The transfer at Kennedy is horrible and whoever designed that station should be investigated for falsification of whatever degrees he claims to possesses.
SLRT
Kennedy needs a complete (yet expensive) reconfiguration
Sheppard
Although I think the Sheppard line should go to the very least Victoria Park, ideally Agincourt, the TTC transfer was practical with 1 side of the platform being the subway and the other side being LRT
Future transfers
Example of future transfer configuration TTC and Metrolinx needs to adopt
At the very least
Sheppard-Yonge, St.George & Bloor Yonge
When possible
Montreal