A couple of considerations here.
First, no major signing will come until after May 10. This (I believe, I could be off by a day or two) is the cutoff point when FA signings no longer count against the comp pick formula. If they were to sign Suh today, they would be essentially trading a 2020 3rd round pick for him.
Next, what does the current cap look like? It's going to cost some $5 million to sign rookies, plus an additional $5 will be kept for late additions.
If this all leaves enough money to sign Suh to a Revis-style deal, then I'm all for it.