Reserve Class should be grouped with the Platinums as that is what they did with the former Club Class.
Doesn't matter if booked in a Suite or in Reserve. Suites and Elites, followed by Reserve and Platinum is how it should work.
Should be AFTER Suite/Elite.
Doesn't hurt you if booked a Reserve level cabin.
I am quite sure anyone in Reserve is going to be grouped with Platinums and not after them. Yes, agree with your call mention. BUT, a good point is that things are never 100% according to Hoyle, so it is possible some terminal personnel will screw things up from time to time.