My base assumption is there will be diminishing returns. This has always been the case for percentage based consoles, as opposed to modifier based consoles. Perhaps it would be better if Tactical consoles return to a flat modifier so they will continue to stack.
If there is diminishing returns, I wonder if after a certain point it would be more feasible to include a weapon type console as your 3rd or 4th Tactical console. Would you gain more of a benefit this way?
Such as; Disruptor/Disruptor/Disruptor/Cannons console layout?
I actually had been lazy and waiting for a Fleet to follow my ships (Like Boffs in space), so I outfitted my other T5 ships (Nebula refit, Galaxy X, Galaxy R, Fleet escort) each with a full set of weapons and consoles. Go fig i now just jump into any of the ships and move a few items around and fly. Pretty fun actually.