If OKC is indeed thinking about moving up specifically to target Mara (and I really don't see who else they would trade up for given their roster is already so guard heavy), I personally think that's a mistake. They'd be better off getting a veteran PF/C to even out their roster instead. Someone who is going to improve the team from day one since the clock is already ticking on their contention window.
The counter argument here is that Sam Presti in particular has had a lot of success building through the draft and it does seem like they've come to the end of the line regarding what they can afford to pay for their stacked roster. One way to scale back player costs would be trading someone on a big contract (Chet Holmgren or Jalen Williams -- trading Williams makes more sense) and then replacing them with a cost-controlled rookie. Sort of a short-term step back in exchange for a better future in theory. But this could easily go the way of Golden State where that rookie doesn't really pan out and then they've only hurt themselves.
Regarding Acuff, he doesn't make a lot of sense fit-wise for Chicago at 4 (they just traded for Dillingham), LA Clippers at 5 (they just traded for Garland) or Brooklyn at 6 (they just drafted 3 PGs in the first round). But as we all know the draft is where we fall in love with who particular players could be if everything breaks right and Acuff is a guy that is fun to dream about maxing his potential. And some team that does need a PG could trade up to take Acuff. If Acuff is gone then Flemings seems like the pick at 7th. But since I'm such a Philon fan and not fully convinced that Wagler is anything more than a competent role-player in the NBA, I'd be open to a trade-down. Especially if both Acuff and Flemings are gone by the time we're on the clock.