Yes, Brad Clark is a big improvement over Conley. Don't think Samuel will be able to knock off Whitehead.
There really don't seem to be any credible Eisenberger challengers. Sgro is the closest to viable and he's an accountant liberal insider. Doubt he can pull off much in the way of momentum.
As far as anti-LRT goes, Carol Lazich one of the perennial delegates on all LRT matters, is running...in ward 1 of all places.