The correct answer is neither but its academic at this point. Four of the main reasons we lost the NE game are: #1) Lack of dependable receivers, #2) Lack of a dependable punt returner, #3) Lack of an adequate secondary & #4) Stupid penalties stalling drives & killing momentum.
Re #1, how many passes were dropped? If you count the interception Joe threw, usually dependable Mike Wallace had two drops, incl. the pass that was intercepted. Perriman dropped one and Waller let a perfect pass go thru his hands in the endzone. BTW, whoever called the play to go right back to him on the next play deserves a game ball. Re #2, Hester has had (past tense) a great career. Its now over and the FO did the right thing IMO by releasing him. He had a great opportunity here and blew it. Re #3, our secondary was dissected for 400 yards, including another keystone cops 79 yard pass play. It could be said that it might have been different if Jimmy had not been hurt but the secondary didn't get the job done. Re #4, what else can you say? Stupid is as stupid does. So, in a nutshell, the first three reasons we lost are attributed to the same set of problems the FO did not fix following the 2012 season. We let Boldin go, we let JJ go and we did not groom a replacement for Ed Reed. Boldin is still performing at a high level on a 9-4 team with no more talent than ours, Hester has looked like a Joker and Matt Elam is a joke. To be fair, much of the blame should be on the FO for #1, #2 & #3. The blame for the stupid penalties belongs with the coaching staff IMO. Its been a continuing problem that continues to hurt the team in critical situations. Most of the dumb penalties are the result of improper technique or lack of discipline, both of which can be resolved by good coaching. Notwithstanding the failure of the FO to resolve Items 1 thru 3 and in spite of Item #4, this roster is clearly a group of under-achievers who should have won at least four of the six games we lost. So,why didn't we? Is it the QB? Well, in successive games, Joe has now set franchise records for throwing for over 350 yards and 4 TDs and against NE completing 37 passes. BUT, he's an under-achiever too. In a different system, he'd have 4,000 yards every year. No, the main reason we aren't winning consistently is #5) COACHING and that starts with the head coach. On one point, Pollard was right. Following the SB run and ensuing retirements, free agency moves and cuts, John was forced to coach. The main reason we lost the NE game was, in a word, coaching. It was the biggest difference maker. Jon Gruden even alluded to the "Patriot Way" and he'd be right. Sorry, Harbs!
BTW, I assume you meant to say in your quote ... or this roster isn't good enough to win.