A couple of things that happened to our group, and I considere is a clear abuse of game mechanics.
Mobile depots: the current mechanics allows to disengage and be able to refit, even you are receiving damage. Our victim, a BS disengaged and anchored a mobile depot to save part of his fittings and then died. So I propouse you shouldn’t be able to use mobile depots at all if you are receiving damage in something like 30mins or maybe if you are tacled.
Citadels: We were bashing a low powered fortizar in a WH, in middle of the operation the owner logged in, fuel it and then disconnect just to have the +1 extra reinforcement, and due the time cycles it added a week to the final vuln. period. So I propouse that you were not able to switch from low powered to powered state while receiving damage, or you are POWERED ON paying your fuel as everybody does or you are OFF.
So you BS pilots and Citadels owners knows now a couple of nice tricks to keep the isk safe.