He might do worse. Although not discussed but behind closed doors (I have some friends who worked on the Hudak Campaign) the liberal plan for GO Transit was to scrap RER entirely, and instead focus on hourly all-day 2-way service on all the GO Train lines, so that they were very similar in service to the Lakeshore line (hourly however, but with diesel bi-levels)
The other focus would have been on extensions on all lines, Bowmanville, Stratford, Bloomington, Niagara Falls, Orangeville, Bolton, Peterborough, Brantford, Cambridge, etc.
Basically getting votes from the smaller, more conservative towns and cities in Ontario. The focus would have been away from Toronto with RER, which is seen as liberal (electrification aka green, inner city stations and networks) by those from the rest of Ontario, who vote conservative, have a generally negative view of T.O and that we get all the funding from taxes, and providing a train service for the larger Ontario as a whole.