i think its just gonna feel better if the hullmods that are supposed to get debuffs, just get made cheaper instead
eg majority of ships using heavy armor, are already not agile ships, giving them a penalty that reduces that further and almost requiring you to get aux thruster or mobility from an officer, just feels like a tax.
EMR is also a priority smod pick due to cost if not smodded, but otherwise mods like ITU are prioritized over it as is.
EMR is also another thing that will have an impact on performance or on cost, on many ships that just do not need another penalty.
It would overall feel better if those hullmods just get a bit cheaper and we just skip the bad effects things entirely, because lets be real, even if HA and EMR have same cost as ITU, ITU will be first pick over both anyways.
The ships i see getting hurt the most here would be:
Onslaught, Dominator, Legion, Enforcer; both HA and EMR hurts these, and i do not really feel like these need nerfs
Conquest; EMR, good ship, but not the easiest to make work as is
Odyssey, Aurora; EMR, both good ships in player hands, not that good otherwise, not common picks
Phase ships; HA is often picked on these, and while agility nerf wont be that noticeable on them, these ships already struggle as is (minus doom and ziggurat)
Radiant; here i will not mind as the ship is quite ridiculous anyways (but that one is meant to be)
if gryphon EMR is taken out, that is one ship where i will agree it does need a nerf, but that one also has spare luxury points, so it wont make much impact on it