in my manual it says "do not select v/s or push to level off while in alt* "
when your manual specifically forbids something you don't do it because someone told you to. What happens if you did the answers are at variance. Discussion is OK but before actually doing it ask your company, may be Airbus through techrequest on Airbus world. I didn't suggest anything I just quoted an incident which was totally uncalled for but happened and was serious.