It's not "the defense stinks", as opposed to "the defense doesn't force the pace."
Historically, SU has been a running team. They recruit guys who can run, they recruit athletes, they recruit scorers, at times at the expense of fundamentals. When you play at a slower pace, you put more emphasis on fundamentals, and Syracuse as a team doesn't make this work. What things work, and what have teams that have played at a slower pace used? Good shooting, motion offenses, and post play. I'd say SU went 0-3 on those, flat out ignoring the post, running a predictable offense, and the shooting suffered. If you lack the things to make a slower offense work, it seems like pushing the pace and finding easier ways to score would be helpful. If you want to sit there, and play a defense that makes it challenging to score, but at the same time, is completely at odds with what works best for your offensive identity, then you get games against inferior teams of 49-44 or 55-53. That style allows opponents to establish the game on their terms. A team whose strengths lean towards uptempo play is not going to fare as well in slower games, and SU has proven this many a time in my years as a fan.
If SU is able to dominate the glass, if the opponents make not-so-intelligent plays, you get a game like Western Michigan. A team making 13 turnovers in a half, many of them careless? I'd expect SU to get out and go. SU owns the glass by 20? Same thing. Also, if you get a relatively weak defensive team that loves to run (Duke, Villanova, UNC [in theory]), you get fun games. You get a game where a team is careful and can't shoot, and neither can SU, you get the run of Miami, Pitt, Maryland, NC State, BC, GaTech, Dayton etc, games, where they turn on 1-2 plays, sometimes on miracle shots, for good or bad. But in those games, you'd never look at the opponent as a more talented team than SU. You'd say "they gave the game away". Two potential lottery picks, an additional pick, a hall of fame coach? None of those teams had that. SU went 7-4 against those teams, and it easily could've been 5-6.
Nobody's advocating the Oregon style of "disinterest in playing defense" (best description of any NCAA tourney team I read), but it wouldn't hurt SU to go into a game saying "let's impose our will on the opponent". And that doesn't mean "yes, they can't get easy shots, but if they want to pass for 30 seconds, go right ahead." That is not imposing your will.
Kev