Berrios replaces Crowder, yes. Berrios would be our primary slot and gadget guy if we resign him.
I think the draft is the best place to supplement Davis, Moore and Berrios. That is a competent WR threesome, especially if Moore takes a big step forward like I think he will. However, I would like someone there that can really push Davis and Berrios and give us depth. If we draft a WR high, they can push Davis and Berrios both into slightly smaller roles at the beginning of the season, and ideally by the end of their rookie season, the rookie is playing more than either of them.
Then you can have whoever else compete for WR5 and WR6 (Mims, Smiths, Montgomery, UDFAs, veteran FAs, late picks, etc).