Why not do both, get high quality starters and upgrade depth at the same time? Face it, there aren’t enough high quality starters to go around, and other teams are going to sign some of them. If you wait until that part of the dance card is filled before improving the bench depth you’re just wasting time.
They’re not going to be able to finish the rebuild in a single offseason. And they’re not going to be able to get fewer starters. The rules say they will need to start eleven players on offense and eleven players on defense next season, regardless of how good they are. So they need to get the best players they can get, across the board. If they can get a guy who’s better than what they have and he’s the best they can get at that position they should get him. Don’t leave a hole this year just to wait until next year. If they sign a guy this year and next year can get an upgrade that’s great because now they’ve got better quality depth up and down the roster.