Well, I rewrote a bunch of stuff, but you can now toggle whether you want instant-fire traps, spear traps, and pre-placed mines to activate on enemies. I mean, pre-placed mines are kinda pointless if the enemy is gonna walk all over them (although potentially hilarious). However, the mines will still halt enemy movement when they move over them (unless they are a flier or thief). I think a lazy solution is to give the enemy character slots in that chapter the morph ability (I don't think it does anything on its own) and then assign the morph ability to the move-over mine exemption.
Oh, and something else I noticed. If an enemy disables a trap or picks up a mine, there will be no text box surrounding the "disabled trap" or "recovered mine" text. I dunno why, don't really care to find out. Just don't put thieves in those chapters.