In the Starting Line-Up
Most value you get from rookies and their very cheap contracts, if you hit on them and they are major contributor you can be in the mix for the SB (of course other things like less injuries and a capable QB are important as well)
half of your list of the Bucs is including very good rookies with major contribution through the year (Vea, Wirfs, Winfield, Godwin, etc) if you don't have them its difficult to have such talent on the cheap thus having a team that is a contender, thats why it is important to hit in the draft
Basically good drafting is how you win Championships. Getting FAs to sign cheap contracts only worked for Pats for a bit and won’t anymore.