To me, Bregman and Yuli will determine whether the offense is just good or great. We pretty much know what we’ll get from Altuve, Brantley, Yordan and Tucker. Pena probably won’t sustain this pace (although there is nothing fluky about his start based on the statcast data), but I think he’ll be a good offensive player.
I doubt we’ll see the ‘18-‘19 Bregman again (maybe the deadened balls are to blame), but I think he’ll continue to be a good hitter.
Yuli, I'm not so sure. There are some bad signs underlying his poor performance that aren’t there for Bregman (Ks are up, BB are down, not hitting the ball hard, etc.). Age may be catching up with him.
And the Astros haven’t had a 9-deep lineup throughout this 2015-present era of dominant offenses. There hasn’t been production from C. Most of those years the OF only started 2 good offensive players (Reddick wasn’t a very good hitter), and before 2019 (Yordan/Brantley), DH wasn’t particularly strong.
They aren’t going to be anything like 2019, but if Yuli can pick it up and be mostly what he’s been the last few seasons, the offense will be one of the best in MLB.