I don't see the Conservatives losing seats in Ontario. They were pretty much reduced to their core vote and stoking fears about immigration and railing against the carbon tax won't hurt them in the ridings they hold.
BC seems to be trending away from the Conservatives more than Ontario is - but they were reduced to pretty little already last time in seats.
I'm sure you know more about Ontario politics than I do, but most of these seats were won by the Conservatives pretty narrowly in 2015 and a slight shift to the Liberals based on either
1.Dislike of the fearmongering politics
2.Dislike of Doug Ford and his mindless populism
3.A shift of some New Democrats to the Liberals
could swing a bunch of them to the Liberals.
1.Carleton
2.Barrie-Inisfil
3.Barrie-Springwater-Oro-Medonte
4.Simcoe-Grey
5.Simcoe North
6.Markham-Unionville
7.Oshawa
8.Flamborough-Glanbrook
9.Milton
10.Niagara Falls
11.Brantford-Brant
12.Huron-Bruce
13.Kitchener-Conestoga
14.Perth-Wellington
15.Chatham-Kent-Leamington
16.Sarnia-Lambton
17.Parry Sound-Muskoka