I have been dancing for four years, and since I was a beginner I noticed I never had that kind of problem when dancing apilado, but when dancing in axis i first needed to adquire enough proficiency before being able to know where my partern has the weight, and still I have problems if she is too light. So I say that it is more difficult, I repeat: not impossible, just more difficult.Given enough proficiency (ie, lots and lots of practice) you will be able to know where your partner has the weight. Sure a beginner will suck at it but then again, a beginner will suck at everything he does, hence, the definition. Having or not a shared axis, it will still be hard for a beginner to realize where the weight is, unless the lady is doing a mega apilado (which, will mean her dancing life won't go far).
I don't know what bad habits you are concerned about. Again, how long have you been dancing to make such claims? The reason I ask is that it seems you're making a big fuss about nothing. People learn by trying and failing. I have yet to know any great dancer that learned it overnight. Bad habits come from lack of discipline and bad teachers, not from lack of normal lack of sensitivity of body awareness beginner's have.
We are talking about difficulty, not superiority of a style over another.