Love this mod, and have been using it for some time now. This mod really punishes you for putting on too few RCS ports or having an unbalanced craft. No more relying on stock's insane SAS. The future developments are also very welcome, having new controls on the NavBall is a great idea and it looks like something I would quickly be unable to play without.
Two things for if you ever decide to add new parts, though:
The game could really do with extra-big RCS thrusters, although I currently just use tweakscale to fix this, so not urgent at all.
Spaceplanes are overly nerfed with this mod. This is because they are already slow to maneuver in Stock, normal RCS thrusters have a low heat tolerance, and they end up needing many parts to cover all directions with 2 way symmetry. This means they have a more parts and less torque, which doubly slows things down on less-than-ideal machines. Personally i think you could do with a B9 Aerospace-style, plane RCS port that is aerodynamic, a five-way thruster, more powerful, and maybe a little heavier to compensate. That way SSTOs wouldn't take such a hit.
Thanks for the mod, it turns running out of RCS from minor inconvenience to a high alert problem, great for adding tension to any easy mission.