I dunno, it's hard to say anything too firm in the abstract, but I tend to think that we need to buckle down and really build, including for next year. That means for example if Vogelbach continues to have a lot of success, instead of trading him, we exercise his option and have him as our main DH next year. If Crowe is really a lock down multi-inning guy, that's hugely valuable for a rotation that will still only be so-so even with Contreras, Keller being ok, and a decent FA pickup.
If we get a chance at the right player, I don't think anything can be ruled out, but the basic principle really needs to be more that we replace the bottom parts of the active roster rather than the guys in the middle or at the top (Reynolds).
I tend to think that other than Reynolds, there won't be anyone who brings back a meaningful haul anyways. Even if we just take a 50 FV prospect, it's great to have lots of them, but it's just an average player if everything goes well and they don't exceed that ceiling.
With Crowe specifically, I think just wait and see. A multi-inning shut down reliever is a huge weapon, especially on playoff teams, so see what's out there. He has no track record, and we'll see what it looks like when the trade deadline rolls around. Maybe he's close to this good all year, maybe he regresses. The stuff is definitely there now, as opposed to when he was starting. He could be good all year, we could keep him for next year as a pre-arb player, and then maybe he's close to that good again and still has huge value at the deadline. In general this year, I don't think there are any players who will be worth trading this year.