The 162-game thing really doesn't bother me. And I don't even like Galvis! But he's the longest tenured Phillies player, the apparent clubhouse leader, and it means something to him. In a meaningless season a little sentiment doesn't bother me. It's not actually coming at Crawford's expense, because a month ago there was an almost-zero chance they were even going to add him to the 40 for September (of course a month ago they also though he'd be in the AAA playoffs). Things have changed and they are looking for a way to give him a few looks (maybe, we still don't know if this will end with him starting at 3B in the major leagues two weeks from now).
I don't think the fact that LV's playoff hopes are dwindling is a coincidence either. With the struggles and all the player movement Klentak, Jordan and Wathan can experiment with the AAA roster as much as they want, for what is only likely to be two weeks. It's like early spring training (and so are the major league games).
I would not be thrilled if JP Crawford is the Phillies starting 3B next season, but that's mostly because I hope they trade Galvis for a pitcher. If they want to extend Galvis - again, not my preference, but not impossible - would you rather move Crawford or trade him? Hey, what if he is Machado's replacement on the Orioles? 