Not quite. Very quickly: a base 3-4 puts more speed on the field and allows more flexibility facing today's spread offenses. Specifically, if an offense breaks the huddle on 2-and-medium/long with 11 Personnel (which could be a dozen different formations) UK will have more speed on the field for run or pass. This becomes even more true if the offense is no-huddle and didn't allow a substitution.
UK runs a 4-2-5 out of their nickel since Stoops arrived. At the beginning of the season, they split coverage duties like some Big 12 defenses do. UK won't run it full time because they don't recruit like Ole Miss, and offenses in the SEC don't mandate it (yet). Could well be the full-time defense in the near future though.
Generally, as Stoops said on his call-in show Monday, another factor on the three man front versus four man front is he "hasn't been able to recruit defensive linemen like at FSU." It takes a very special athlete to be a 4-3 defensive end.
Gus, we disagree here and that is perfectly OK. It makes for good conversation. [winking]
Yes, the 3-4 theoretically puts more speed on the field but that is a really a question of how good are your LBs. I would also speculate that most 4-3 W/S DEs are just as fast as most of the LBs in a 3-4. They are asked to use their speed differently but that is not really the point. Personnel groups using a true TE are really on the decline except at programs that still run basically a "power" offense. The real point being here some form of a 10 or 20 personnel group is most common.
IMO, it is easier (and more effective) to make formation adjustments with a 5 man secondary than a 4 man secondary. While there are other problems with a 3 man front (no scheme is perfect) if I were going with 3 down linemen I would probably opt for a 3-3-5 base rather than a 3-4-4 base. And, in the big picture, I think those hybrid DB/LB types are "easier" to find than DTs.
Anything is better with a "very special athlete" but I totally disagree about notion of finding DEs for the 4-3, especially when compared to the need for DTs. IMO, DT is the absolute hardest position to recruit because, regardless of scheme,
everyone wants and looks for the same thing in DTs (i.e., size, get off and foot speed). As I said before in a 4-3 base you can play a "smallish but quicker" DL at S/S DE and can get away with a really "small" pass rusher at W/S DE.
IMO, in a 3 down scheme you need 3
really good DTs. The more I watch good 3 down teams play, the more I am convinced they are good not because of their LBs or oversized NT but good because
ALL of their DLs are really "high quality" DTs and bring size, get off and foot speed to the defense. IOW, because of collective great individual talent they can do with 3 what other teams do with 4.
FWIW, I don't see UK in a "true" 4-2-5 very often. And by "true" I mean 2 ILBs behind and inside 4 DLs. it appears to be a very situational alignment for them. When UK is in this alignment they usually play the DEs in a 2 point stance and I'm not sure why they do that.
All JMO.
Peace