Well, I found this system to be the most interesting take on supports we've had in a FE game.
Still, there are a couple things I'd like to see changed/fixed:
- As many have said before, bonuses to Mt/Hit/Avo should also apply on EP. Currently, only such bonuses provided by an Adjutant do.
- Units with no support levels with the fighting unit should still provide a linked attack/gambit boost bonus, currently they provide none. The Serenes wiki says allies with no support grant a +3 Hit/Avo or +1 Might +5 Hit boost, but that is actually not true.
- Ennemies should also benefit from linked attacks/gambit boosts.