I read over some of this stuff, and one thing i do like is changing front teleport to db4, but they should also change teleport away to df4 if you're going to do that.
i dont think that immunity frames should be added, but i'd like to see it get the scorpion treatment where if you teleport on wakeup (and only during wakeup) you get armor during startup. just wishful thinking
I think that DB3 and exDB3 is what NRS needs to fix in order to make raiden better, and here is what i would do
1. Damage scaling adjusted
2. EX version auto corrects in the air when coming down
3. +4, same pushback
4. Displacer: special cancellable at apex of upward motion with teleport or superman
5. MOS: at each point creates an orb (one in the air when at the peak, one when he comes down if EX'd). this would make the move a staple part of that variation and create all sort of interesting trap setups if done properly IMO, especially in the corner.
as for MB superman in displacer, i'd like to be able to use it to have him grab opponent similar to what he does now, and be able to control what direction he throws him from the point you burn it. Cooler idea: do what he does now where he throws back and teleports, but instead of getting that final hit allows you to continue combo. would be another restand