if the system is a liability, then it shoudn't be used. but if it helps the student, whether actively or passively, it can be of value. it just needs to be reliable.

fighting of controls? it fights the controls much like dihedral. when you release the sticks, it rights itself much like dihedral. if it does that well, then why not? problem, however, is it that it seems to do it unreliably.

reliability, i think, is the issue. the crutch? i don't think it's wrong to have a little help when you're a beginner. my two cents!