and/or player(s) are not getting along. It has nothing to do with execution. It has everything to do with division somewhere. Either between the schemes of the D, DL, and DB, Coaches, or players involved. Until you fix that, you can't execute.
IMO, if you call a D play and then the DL calls their own play inside of that and the LBs call their own play inside of the D and the DBs call their own play. That is a recipe for disaster. Unnecessary complexity if that's how it goes. Because you have to expect the entire D to work together and expect what is happening at three different levels to be happening in unison. That is way too difficult.
Call a play, line up, and run it. Remove all the cute stuff.