Scheme does not ever take a backseat on defense. Football is littered with talented defenses that aren't as good as they should be (or good at all) because of varying schematic/coaching reasons.
I will preface this by saying this is not me saying that Heacock should be fired or that there should be a wholesale scheme change. Heacock has served us well with this scheme and is the reason for a lot of success. Now that that's out of the way it's also fair to point out that programs with talent don't run this system because it has glaring inherent weaknessed. I've said this before but this structure has no natural edge meaning you have to spill everything from a scheme standpoint because unless you just happen to get into the perfect call, you're asking someone to set an edge that's in no position to do so. When you have to spill everything, there's a big chance that you have overaggressive play by LBs and DBs that result in huge cutback lanes especially against teams that are good at running outside zone. See the first TD play from Cinci. Sure, we can point out that basically no one on the back side was sound, but that's the risk you run. I've talked about this before, it's not new, and it's not the first time we've gotten got in the running game like this. It's a bug of the system. IMO, good run defenses set hard edges and it's the one thing that I really don't like about the system.
So, for this structure to work and be sound against the run, you need very good LB play. LB is hard in any system. I'd say it's the hardest position in football because of the responsibilities they all have and the physical attributes it take. We haven't had good LB play for awhile and it doesn't really matter who was playing. This system just will not work if your baseline linebacker isn't good. Your DL is taking up bodies for LBs and DBs to clean up and they need to do so.
This isn't some dire "we're ******" post. The defense will be fine. These are just things that are going to happen once or twice a year like we've seen. Sometimes the offense overcomes, and sometimes it doesn't. If you wanted a change, personally what I would do is develop some packaging where you go to a 5 man front consisting of the 3 DL that we currently use plus one more anchor/edge player and then a hybrid type of LB/pass rusher who can hold an edge. I don't think this is some huge personnel lift as I think we've had the body types in the past and on this roster. You drop a LB and drop a safety and you concentrate the running game to the middle. We have some stuff like this in alignment but we don't change personnel.
If there were a Will McDonald, Mike Rose (preferably freshman speed but that's a different discussion) or two or three of that level of player at each level of the defense, I'm guessing the scheme wouldn't be questioned as much.
Sure it has to be run well but having speed in those areas makes a ton of difference regardless of what's being run.
