What’s not to like about Buffalo’s aggressive overhaul of its defense, which ranked 27th in points allowed and 29th against the run last season? The Bills got better in terms of run-stopping with defensive tackle Sam Adams and end Keith McKenzie, improved their tackling and play-making at linebacker with Takeo Spikes and Jeff Posey, and upgraded at free safety with Izell Reese. Overall, they’re quicker across the board on defense. Plus, they played the tricky Peerless Price situation like a Stradivarius, trading their No. 2 receiver to Atlanta for a No. 1 draft pick. That means they’re back in the draft, even after giving up their 2003 No. 1 last year in the Drew Bledsoe deal. If Josh Reed steps up at receiver, replacing Price, the Bills are right there in the rugged AFC East. This much we’re certain of: Nobody in the division has improved more.