Definitely some problems with alignment when you show blitz out of 4-3 Stack, & any zone coverage with corners. They walk down a bit inside and if they are in a zone, the WR will torch them. I showed blitz and froze my defense on a 3rd & long, everything was covered & then I saw a streaking receiver open for a TD. Turns out that alignment is a problem again. However, the problem goes away a bit if you audible down to 4-3 from Dime, which is a lifesaver.