Yes, for replacement of older cars which are nearing 50 years old. They also serve as stopgaps while EMUs are ordered. After electrification, these cars will be used on lines like the milton line, Richmond hill line (which both are to see significant expansion (2-3 trains each, probably even more), as well as on all express services (Kitchener, Lincolnville, Oshawa, Hamilton, etc all heading into Union), the new Niagra falls line, the Bowmanville line, and maybe even the bolton/midtown lines if they're ever acquired.
They are, the entire layout is horrendous. No electric charging ports on many new trains, no overhead racks (I don't even get why, it would save so much space on the train), the terrible seating layout that wastes space under the seats and legroom, the lack of reclinable seats (but this one is less important), etc.