Well, personally, I'm excited with the 3 new DL(OLB) signings. As with anything line related, it also helps the current players, yes that includes AJE, Oliver and Rousseau.
Safeties are strong too IMO, Forrest makes this a strong enough group with Rapp, Bishop and Hamlin. Only glaring need is CB, and since supposedly the draft is filled with good interior DL, future is bright! Unless Milano has aged badly, LB group is set too. OLine are strong, JA is back there, and hopefully Palmer produces and Kincaid is back to his rookie form.
Barring injuries, this Bills team seems already stronger than the 2024 one, and the draft is still to come!