As mentioned, it serves a pretty important role in providing transit in Alta Vista, Uplands, Greenboro, and the general hospital. Plus it will be a part of the future Baseline BRT.With stage 2 and eventually stage 3 being built, won't it just be an orphaned thing of the past?
Well no, not really. The Trillium Line dodges everything north of Walkley. The South Keys to Walkley stretch will still be required for all Greenboro and Uplands transit for connections to Billings Bridge (local service) or Hurdman (either to head eastbound, or to Lees + uOttawa for instance). The Trillium Line isn't a replacement for that kind of service.Once the Trillium Line starts carrying the bulk of the South Keys area ridership, the SE Transitway will be a bit of an orphan. Yes, it will still have utility as the defacto extension of the Baseline BRT, but there are other options for that corridor for sure.
If anything, the new Line 2 stations at South Keys and Walkley will generate new trips since they open up travel options that weren't really possible or convenient before.