Not sure where to begin with this because as you know I am prone to long-winded technical explanations, and I might need the use of several images or graphs...
I have as a defensive coordinator run the 4-3, 4-4, 4-2-5 and 3-3-5 defense extensively over my coaching career.
Here is what i know:
1. Scheme is only as good as the individuals coaching it and the personnel you have to execute it.
2. All schemes are great against certain things and an absolute dumpster fire against others.
3. There is no maximum extent or absolutes with scheme.
I get that some of you have a major hard-on for NDSU's stout 4-3. Works for them. They have good coaches and great personnel. With those two combo's you can run a kitchen sink against inferior offensive scheme and personnel and win 7 out of 10 times. Remember back in the Paulson era, people used to bitch and moan about the limitations of the 4-3. **Cough Villanova Cough**
I ran the 3-3-5 in a conference with primarily power offenses. I worked with a lot of guys who had absolutely no imagination or understanding on how to defend power. We once lined up with 6-1 personnel out of that 3-3-5 base (don't ask) and got torched to the tune of 355 yards rushing in the first half against a wing-t team. you have to know how to defend and scheme against power and even to that end it might not matter.
I prefer the 4-2-5 because it plays like a 4-4 against the run and a nickel set against spread without ruing the basic principles of the scheme. But the 3-3-5 as I have run and watched SDSU run successfully over the past decade, can be damn sexy against the run. When you listen to 3-3-5 guys, whether it is guys like Rocky Long or the Georgia Military College group, they'll tell you this over and over again: "You need to know your personnel"
the first year we ran it we had OLB's coming out of our ears and we absolutely brutalized teams with disruptive stunts and pressures against the run. I think we blitzed 70 to 80 percent of our snaps that year. A couple of years later, I had a defense replete with DE and DL types and we spent our time in a 5-3 much of the year and almost never blitzed. All are possible within the scheme, but if you get focused on being in a 30 front all the time or sticking to the scheme, you are going to get drilled.
I have said this for years, there is no more maddening offense to scheme against it than power. You can't just line up against it and take stuff away. The 3-3 and 4-2 schemes can line up against spread teams and effectively scheme against a lot of stuff. I don't whether you are in a 5-2, A 4-6, 4-3, power run teams are going to find a way occasionally to make you look stupid. Your goal is to minimize damage and there are literally a million ways to do that.
The wing T playbook has 7,000 ways to run trap, power and counter. I for years being on the offensive side preferred to see teams run an even front running power. The reason was simple: We knew we could control the LOS and the were better blocking angles and fewer variables at the second level. There are a ton of 30 front guys who absolutely believe that odd fronts because of their flexibility at the second level are vastly superior at handling power. I do believe after running both 30 and 40 schemes, that it is a bit of a myth that 30 fronts are easily to brutalize from a power run perspective. As I said, I prefer the 4-2-5 as a defense but much of that goes not to the front or how the secondary is allotted but rather that it as a defense is vastly easier to adjust when coaching at the high school level.
If you really want me to go in depth on this, I can break out a 10,000 word dissertation on the topic. But enough for now. Enjoy your coffee and game week.
GF24.