The last time we ran a 4-3, we were 3-13.
Prefer a hybrid 3-4 with some 4-3 sets.
Find a decent run-stuffing NT who takes up two defenders in the interior and go from there.
No need to reinvent the wheel. IMO.
I don't think it's the massive shift people think. We are actually in 4-3 more than 3-4 already.
It makes sense with the personnel we have which is an over supply of starting quality LB's and a shortage of Edge players.
At the very least, they should incorporate it in the defense as an option to throw teams off. I recall back in the Todd Bowles days we predominantly ran a 3-4 but there were times he would role out 4-3 to confuse teams. I recall at least once, I think was against Dallas.
I personally would love to see
Watt - Philips - Fotu - Allen
Simmons - Hicks - Collins
I think you can upgrade on Allen but I'd like to see what he can actually do at his college position.