Meh. Just an average afternoon for Lou Piniella.
The player didn't make physical contact with the umpire, so, personally, I don't think it warrants a suspension. His refusal to leave the field right away is technically the only thing that violates the rules. Of course, MLB might see fit to suspend someone for causing a scene like that and for the armpit gesture, but without a physical incident, a couple of games is probably the maximum you would see.