We need to clearly distinguish the two phases of the project. Phase 1 (under construction) is highlighted in Yellow and Blue in the below image. Phase 2 (proposed) is in green.
Phase 1 will cost $43 Million and will include the new Central station's two rail platforms, a pedestrian tunnel under the tracks at Waterloo Street (incl. stairs and elevators), a bicycle bridge across King Street, a 5-bay bus terminal and a parking lot which is a placeholder for future development. The new station is planned to begin service in Fall 2023, at which point the current Kitchener station will be permanently closed.
It is absolutely essential because a second platform is required to support the planned all-day service pattern. It would be stupid to spend money building a pedestrian tunnel and second platform at the existing station, when that station is severly hampered by its lack of connection to the light rail line, its poor pedestrian access and its tiny 2-bay bus terminal. Especially when the Region already owns the land for the new station and has been focusing development toward it for over a decade.
This phase is being built very modestly, with basic pedestrian tunnels, standard bus roadways etc. The only element of this phase which could be considered excessive is the bicycle bridge across King Street, since the bike path will end at the station anyway and it wouldn't be that unreasonable to end the path on the west side of King, provide bike parking there, and use the existing platform along the rail bridge as a walkway.
Phase 2 is estimated to cost $63M and will add the station building and landscaping. It is currently on hold due to lack of funding. This is the portion which could be described as a vanity project, since the station would technically work fine with just a basic building with a ticket office and waiting area, rather than an imposing structure with high ceilings. The station would also work fine if the remainder of the site is left as a barren patch of grass, instead of turning it into a public plaza.
However, I'd like to point out that it is typical for a city's central station to be built with more than just the bare minimum, because it is a representation of the city and can have a significant effect on civic pride and redevelopment potential of the surrounding area.
Does Union Station really need an 88-foot ceiling in the entrance hall?
Image by Michael Caven via Wikimedia
Did the current Kitchener station really need a tower? Apparently not, given that CN removed it in 1966.
Schenectady station technically worked fine when it was just a shack.
Image by Benjamin Turon via Wikimedia
But there is a reason that it was totally rebuilt in 2018.
Image from Daily Gazette | Image by
Rich Coffey