The tldr; version of that is with a significant amount of injury luck, the rotation will continue to be passable or better in 2022, as long as Keller and Brubaker are holding things down and Roansy continues to progress. That's not the best starting point, but it's not a terrible one, and is even better if we go after Quintana again as we should, as well as with Burrows potentially filling the same kind of role Roansy did this year.
It's really the offense that's the catastrophic problem, between Hayes alternating between injury and a slap hitter, Cruz not settling in, and the more glaring problem of half the lineup on any given night. I don't even believe it's possible, but the biggest step in the right direction would be going out and paying for Haniger or Mancini as a starting point, and perhaps one more from there. Then, together with internal improvements, there's at least some projection to more relevantly hang around in the division mix if nothing else.
That's about as optimistic as I can get. Despite his struggles, it's encouraging that Cruz had still hit for impressive power, even though it should be emphasized that the current profile isn't really sustainable. But it's not really out of the ordinary for him to have a pretty severe struggle to adjust -- it's worse than I expected and I do think the Pirates have and are making it worse, but his comments about choosing pitches and what he can and can't work with in MLB suggest that there's more going on with him than I think most people assume.
Otherwise, we'll see if Castro's success can be sustained, as that would certainly be an enormous boost. I'm less sold on Marcano, but he should still be playing, and above all else, I think it's pathetic that we haven't seen Swaggerty at all yet. He profiles to be a similar type of player to what you see in Marcano, except he also has the ability to play a premium position, even if we aren't going to move Reynolds. There's still just no reason not to maximize his at-bats for the remainder of the year. Allen might be an ok fallback #4 OF option, so I stop short of dispensing with him, and Gamel can certainly step up and make some things happen, but he's gone and/or if we are going to sign somebody, we should sign somebody significantly better. There's just no equation where it makes sense not to see Swaggerty starting two or three weeks ago. I can only assume he'll get the call in September for somewhat regular playing time, but that's an opportunity lost.