It's so early that it's hard to make conclusions on if things like his command are sustainable, but I've definitely noticed his command of the splitter is night and day compared to last season. He's using it pretty aggressively against lefties, unsurprisingly, but where he's spotting it is huge. Seeing a lot of down or down and away and significantly fewer hangers.
Combine that with the regained fastball velo and everything plays up. He froze Ohtani yesterday on a fastball down the middle lol, that doesn't happen if they're not respecting the splitter. With Freeman he went down and away with the fastball, with a splitter mixed in there, and then went up and away for the whiff. This kind of sequencing and command of his stuff should mean he's hopefully closer to 23-24 Hoffman that last season's version.
I'm also hopeful that having Varland and Rogers to lengthen out the bullpen and cover some of those high leverage innings means he's not as overused as he was to begin last season. He notably started strong last year, but was being used so often that I wouldn't be surprised if this led to his stuff and location both backing up as the year progressed.