Yes, I am gobsmacked by samplitude. It is NOT as complicated to get going as its reputation suggests. No way. In some ways simpler GUI than cakewalk.
Another useful note: Samplitude has only one user vst directory. In order to import all your vsts and vsti's, you enter a directory, click OK, and it imports. Then open the dialogue again (p, then go to vsti/rewire), enter the next vst directory, repeat and rinse. It remembers permanently everything.
When I exported/imported an OMF, I hadn't done any mixing yet, so there were no plugins. Not sure whether it handles all of that.
I will try to look into organizing the plugins. That is clearly a useful feature that I would miss if not possible in samp.