I think that an Ellesmere/York Mills/Wilson BRT is a much better idea than the Lawrence LRT. It's the one in dark blue, feel free to ignore everything else.
The Wilson and Ellesmere portions of this line have already been officially proposed, in the OneCity transit plan. Though, the Wilson BRT in One City inexplicably ends at Keele.
Anyways, the benefits of this, versus a Lawrence LRT:
1. Cheaper. It should be a fraction of the cost of the LRT
2. More appropriate technology. Whether or not it's on Lawrence or Ellesmere/York Mills/Wilson, a BRT will have more than enough capacity.
3. Solves the issue with the "missing" section of Lawrence.
4. Brings RT to central Scarborough. An alignment on Lawrence would completely miss this.
5. RT connection from central Scarborough, directly to the Danforth Subway/SRT and the potential Don Mills Subway/LRT
6. Another "bridge" between Spadina and Yonge subways.
7. RT connection to potential Jane LRT
8. Rapid transit on Ellesmere will return in the case that the SRT isn't rebuilt.
9. Can go branch off on Markham to bring RT to Centennial.