Cancelling the London-Kitchener train without replacing it with a comparable bus service would eliminate any credibility that the Conservatives have with their election promise to upgrade the railway. If they want to introduce a fast and frequent regional rail service in the corridor, they need to start building ridership in the corridor. Abandoning what little ridership the corridor currently has, would clearly be contrary to that goal.
The train is currently carrying more than a busload of people. A bus can match the train's travel time while also improving access within KW (e.g. by serving the Central Station LRT stop and/or continuing beyond Kitchener Station to Laurier and UW), so it's safe to assume we could retain a fairly large proportion of the existing ridership with a GO bus service from London to Kitchener. Switching to buses would enable railway upgrades to proceed without needing to constantly institute temporary schedule changes.
Indeed London Station is probably the single best candidate for new high-level platforms with level boarding to VIA trains. Apart from Union Station, which is undergoing its own redesign process, London is the busiest station on the VIA network without level boarding.
All of London Station's platforms are located on sidings which are never used by freight trains, which gives VIA and GO full freedom to raise all of the platforms to their liking. Personally I'd like if they raise the island platforms for VIA while leaving the north side platform low to enable future GO train use. Since GO's level boarding standard is 610mm while Via's is 1220mm. GO trains will all diverge towards the north (towards Kitchener) so it makes sense for them to have the northernmost platform to reduce conflicts in the future when there is more than one approach track.
Reaperexpress conceptual track users. Tracks colour coded by primary user, not necessarily track owner.
View attachment 489519
Level boarding is essential to reducing dwell times and improving reliability. Passengers can board and alight the train at a higher rate with level boarding than they can while carrying a bag down a flight of steps (often handing their bag to an attendant). Saving a couple seconds per passenger adds up, especially at busy stations such as London.
Furthermore, the manually hand-cranked wheelchair lift takes absolutely forever (several minutes) just to load a single passenger. The presence of someone in a wheelchair basically guarantees a 10 minute delay for the train (5 minutes each at the boarding and alighting stations). With level boarding and Via's usual gap filler plates, a customer in a wheelchair takes only a second or two longer to board than an able-bodied passenger, eliminating that source of delays.
While level boarding is not specifically an item that most people consider when chosing their mode of travel, the overall ease of travel certainly is, as is the speed and reliability of the service. Level boarding will improve the ease of access (primarily for those with luggage, the elderly etc), and improve speed and reliability, so it follows that level boarding will (very slightly) increase passenger demand.