The GEXR to Kitchener will be OCS/dark territory to begin with but CTC isn't really necessary for that section of the Georgetown line since the number of trains and their frequency is still relatively low. I think VIA is the one that's more interested in pursuing signalization at this time on the subdivision since they want to increase the number of counter-flow trains;
That schedule is obviously preliminary as for instance there's no way they'll allow the VIA and GO trains arriving at Kitchener just after 1800 to operate so close together on single track OCS, so as to have them arrive at Kitchener at almost the same time.
Everything up to Georgetown is not a problem since its multi-track CTC.
On another note I find it strange that VIA trains traveling in the same direction and time as the rush hour GO trains on the GEXR will apparently service the same stations as GO trains. Surely there's no need from them to stop at Acton and Brealau as well.
Not sure by how much but they're behind schedule. Also it seems as though they are encountering more problems than expected with the water table in the area.