Maybe I'm an outlyer, but I liked using SCM as a single app. The new "toolkit" seems cumbersome, and maybe I haven't given it enough of a chance yet... but I'm used to SCM and it is very useful as a one-stop shop! We compare the MS baseline against a few 3rd party baselines, merge, and then generate a new GPO.
I understand there's no more developement on SCM, but please don't kill it. It'd still be nice if you offered the CABs. =)