Defense got three strips. On two, the ball bounced the Giants' way. On the other, the 12th man negated the one FF that the Pats recovered.
The Manningham catch at the 50 on the Giants' final drive was the result of spectacular effort on his part, not poor coverage. His footwork and body control were perfect.
The defense gave up 19 or the 21 points credited to the Giants. Three of those 19 were a tactical sacrifice - 3 points being the difference between holding them to a FG and leaving about 15 seconds on the clock and letting them have the TD to preserve nearly a minute for Brady to work with.
I thought that a lot of guys on defense produced very good individual efforts. Spikes was very good. Moore and McCourty did well. Arrington was good overall, though he missed a couple opportunities, as did Mayo. Ninko got pressure and set the edge very well, I thought, but missed a couple plays in coverage. Both Warren and Ellis got good push against single-blockers when Wilfork and Love were doubled (outstanding scheme execution by the NYG OL, I thought), but didn't quite get there. And they also couldn't shed quite quickly enough to plug running lanes consistently. Great effort for a couple old guys, but underscores, IMHO, the need for some fresh, young wide bodies on the DL for run-stopping as well as pocket-push. [I think Brace is likely gone and I'm not counting on Wright or Pryor being healthy enough to continue - they're mostly passing down, interior rush specialists, now, anyway, rather than early-down run-stoppers. And Deaderick gets very good pressure, but he's not yet even as good against the run as Ellis.]
The fact that Tracy White was mostly the 4th LB in 3-4 sets illustrates the need for yet another solid OLB who can set the edge, tackle well and play some coverage. White just wasn't getting it done on Sunday, even though he was apparently preferred over Fletcher. Ihedigbo and Chung seemed less than stellar in run support, though that was likely a result of them being locked into coverage duties (not that they were stellar there, either).
Overall, I thought the defense played generally above expectations and could be very good next season with the addition of a couple "backbone" pieces. By that, I mean solid, assignment-oriented, "do your job" types who can execute well enough to allow the playmakers the Pats already have on the roster to shine.