I don't know that he really did get two good chances. From memory it seems that he got his abs in snippets without getting consistent abs for an extended period of time. With relatively few abs at the major league level I don't think we know if he is AAAA or not. Sure makes me wish he could have got them last year so we had an idea. If he could hit at the major league level he would be a useful player with the ability to play multiple positions
Parmelee isn't exactly Garrett Jones here (only 84 PA with the Twins, although different age and minor league resume). Parm's had 631 MLB PA so far, and hasn't shown anything at all in the last 540 (84 OPS+, zero standout skills).
If we let guys like this rack up consecutive 500 PA seasons, fans would probably be criticizing the front office for not realizing the guy couldn't hit earlier and wasting time with him.
That said, if we lose him at this point, it will hopefully be in favor of someone with better MLB chances, not just some random roster patch (i.e. not Bartlett!).