Hi Bustin_Bookies!
The Nets play at the slowest pace of the whole league by a clear margin. As they play on a slow tempo, their games need a lot of offensive efficiency to go over a high total line. Both Deron Williams and Joe Johnson have been struggling on their shooting, their post up game is gone without Brook Lopez and their amount of isolation plays (especially by Joe Johnson) having been causing them to struggle on offense as well. The Knicks were on a very poor spot (5th game in 7 days) and if it wasn't for their terrible start of the game (that forced them to accelerate their game pace for the rest of the first half), I believe this game would have gone clearly Under the total posted, like it happened in the Nets x Bucks game last Sunday.
If you have any other question, feel free to ask me!