I'm not so sure TBH.
Woodburn was always pretty good for Bath, and anywhere giving him enough game-time would improve that. He left us as 3rd/4th choice wing. If he were with us now, he'd be what? 3rd/4th choice wing?
At Ex, of course, he's 2nd/3rd choice wing. He looks more confident than he did at Bath, but that's what happens with game-time (and decent man-management); I don't think he looks a new player though.
Devoto will improve with game-time, currently he's a bit of a Twelvetrees - all the skills (if not quite so sublime as Billy can be), a boshing option; but no consistency (yet still more so than Billy at the same stage). That consistency is never there for young players when they're not able to settle. Letting Ollie play a full season, and only at centre, and he'll be genuinely challenging for England.
Ollie's principal challenger for the England 12 slot for 2023 are going to be Slade and Mallinder (and Fazlet if he makes a full-time switch). The trouble is that one of those challengers is at the same club, wanting the same role in the team. To me, Slades always looked a better option at 12 than at 10, even though he's barely ever played there, and is obviously earmarked as a FH going forwards; but if Baxter changes his mind on that, it'll be a real problem for Ollie. Not insurmountable, but problematic.