You literally transmute matter at will, you do not need to fight Killcannon just turn his robot arm into cheese or something. Your nemesis is a villain that you do not need to consider the whole cannot effect living tissue thing for even a second. That is all.
I really hope they acknowledge that maybe Eve unwittingly went into a sort of stale suboptimal fighting style, or at the very least try to justify her style, something like “actually the pink energy field stuff is way less exhausting for her to do than matter transmutation, so she’s defaulting to it for stamina” or some bs like that