I think to me the two biggest questions are:
1. How well does the team walk the line between holding onto depth and not wasting bullets?
For example if Jameson Taillon has an ERA north of 6 and peripherals to match, how many starts does he get before he's yanked from the rotation? 3? 5? 10? On the flipside even if no one is struggling let's say Ben Brown is monstrous in long relief or Jaxon Wiggins is demolishing AAA, how long does it take to get them into the rotation?
2. The team has seven full time players heading into FA next winter (4 bats, 3 SPs). How many of those spots can you feel confident in filling internally by the time October runs around?
For instance Kevin Alcantara is the ideal internal choice to replace one of Happ/Suzuki next year. But is he going to get enough 2026 plate appearances that we can confidently say whether he should or should not get a 2027 job? If he only gets ~200 PAs this year, even if they're great how much can you take away from that?
These are thankfully not the worst problems to have. It's not quite champagne problems but it's a far cry from "do we have a single viable 3B anywhere in this damn org?" like we were asking a few years ago.