I definitely don't think firing the manager mid-season accomplishes anything now. I felt it could happen if things were really spiraling, like, a consistent .400 team or worse, which they were very much on their way to being before the West Coast road trip. And it could happen in August but at that point it would just be an internal promotion before the search begins.
The XW-L is a nice change from previous seasons, really. I think we've seen enough good things to think they will stick around in competing for the wild card, as well as enough bad things to know they won't be the top wild card (or a division contender). The suggestion that the humidor actually will have less of an effect in better weather (as was the case out West) is promising as well. Yeah it affects both teams but the Phillies seem to be hitting the ball harder than most teams.
I still don't shut down Harper and "wait 'til next year" because frankly, why would next year be better/different? Sure there will be money to spend and holes to fill but also a lot of players potentially getting worse or at least older - some of whom aren't so great now either.