WR will be interesting. Claypool was the big move at WR. And because they have to potentially pay Claypool and Mooney after 2023, they can't really sign a FA WR for big money. They probably aren't going to trade for another WR because they already gave up a high 2nd for Claypool.
I don't necessarily think they need a true #1 WR. I think if they can maximize Claypool and Mooney and use them the way they perform best, they can be a productive offense. The Niners and Seahawks have borderline #1s at best and have productive offenses (DK and Deebo each only have one 1200 yard season, Deebo back down to Earth this year, DK down to Earth last year). But they could add a slot guy early in this draft and I think they'd be fine. Even if not Addison or JSN in the top 15, they can potentially get Zay Flowers in the 2nd. Claypool, Mooney, Flowers, Velus and a couple cheap FAs could be good enough, especially if you simply use Montgomery more as a receiver or replace him with a dynamic weapon (what I'd prefer).