NE lost in the first round for a variety of reasons. The 09 Baltimore loss was just a complete team collapse where all of the team's flaws that year came to a head. No player played well in that loss. Against the Jets the the offense and defense both had too many breakdowns. The defense actually did a good job against the Jets in the first half but then rookie mistakes started piling up; namely on the Cotchery catch and run where both Spikes and McCourty took bad angles. The offense scored 3 points through nearly 3 quarters, and I felt the oline and Brady's struggles were the biggest reason they lost. That and the Jets happen to be a very good team; it's not like NE lost to the 7-9 Seahawks.
as far as neglecting need; New England drafted an outside LB in Cunningham last year. His stats didn't show it, but he actually did make plenty of contributions to the defense the past year. TBC, Mike Wright and Gerrard Warren can thank him for several of their sacks, since he was able to put pressure on QBs and force them out of the pocket. He also did a nice job against the run and got pressure on the QB at critical points, like at the end of the Colts game. He would have had at least 1 sack against the Jets in the MNF game but Sanchez got away with a facemask. He didn't make the type of impact a 2nd round pick should, but he was able to make the transition from DE to OLB despite missing part of TC and all of preseason with an injury and missing the last few games as well. He needs to take the next step in 2011 and the team is very high on him.
as it stands right now there are 3 players on the front 7 who need to improve: Cunningham, Spikes and Brace. I hated the Brace pick when it was made and he was a non-factor his rookie year, but when he was healthy in 2010 and started he actually did a nice job against the run. Spikes is a good 2 down LB right now but he needs to improve his coverage and stay off chatroulette. Cunningham needs to stay healthy and continue to improve, and if these players continue to develop, not only will the team's past 2 drafts look even better, but the defense will improve significantly. The reason the team didn't add to the front 7 this past draft was because of all the young players and BB's belief that they can continue to reach their potential.