DTackle and Nose stance??

Coach,

I don't see anything 'wrong' with your stance - it is all based on the purpose of that player.
I used to be a NT in college in a 3-4. We predicated our first step off a read as we were responsible for 2 gaps (T-N-T). This being the case, I couldn't favor one side or the other, so I adopted a stance that was darn near parallel in the foot stance....it was REALLY squatty, so at the first step I posted the center and the next step was countering his reach.
I later moved on to play in a 42 Nickel defense and later some AF2 ball as a DE and the stance was dramatically different, because it was all about PENETRATION, so the near foot UP to gap with opposite hand down was the way we had to play it ---being there was no reason to 'post' a blocker / control a gap.

I teach our NT / DT that their stance should be much more compact (less stagger) because we want them coiled as much as possible. The 4 point base is a good place to start, to teach them that on that first step they'd better be getting a up-through explosion on the bag / blocker.

the potential problem with that big stagger is being able to step w/ the inside foot to take away the inside release in the 4-3. which foot is up for your guys?

The stance I was speaking of when I started this topic a year ago is a stance that I would use more in a defense where my TNT's are 2 gap players. This would allow them to explode into the man that they are mirror reading and then get across his face. Now that I am coaching in a defense that is mostly gap control I will teach my kids to cut down that stagger to allow them to stay under better control.