A fundamental misunderstanding in D&D is that all sorts of rules need to be in place to keep players from cheesing out with monster characters. My admittedly biased experience is that players want to be a cool monster and the actual power of breath weapons, traps, stampede attacks or whatever is secondary.
This again plays into thinking about Fate cause hey, a monster ability is a gimmick right there.
@drwho which edition? How’d you work it?
Actually now I’m thinking that trying to make monster abilities about equal *is* a vital rules thing because you want to downplay it (inequalities will throw players into thinking about rules); so that A’s trap setting ability is vaguely as good as B’s regeneration ability so both players can focus on being little dragon and hulking wolf people.