Again, I don't expect that all those guys will be back, but you have to have someone to replace them and if you're investing that much into a singular player, you're looking at the Ojabo's and JAD's of the roster to take their place and that's not exactly an ideal situation, regardless of whether or not I think Madubuike is worth the contract in the first place.
I also am wary of void years due to how it's worked out for the Saints where they're slowly bleeding high end talent and in a perpetual state of mediocrity with no end in sight because they have to mortgage future cap to even get under year after year. I'm not even sure they could realistically blow it up and start over this year because their cap is so dire, but I digress.