I dont think dynamic effort bench really helps you enough for me to worrying about doing ME and DE in the same day. Therefore i do max effort to a 1RM one day and then i do a rep day to a max 3-5 and sometimes throw in a speed day once a month or so.
But i dont feel you would get the same benefit if you didnt do DE squats on a seperate day. I know alot of guys that don't squat twice a week, but they alternate heavy squat and deadlift days. Like this.
max effort deadlift
max effort squat
So it can be incorporated successfully that way. And i've also seen guys that will do max effort for a few weeks, then do speed squats for a few weeks. They will work up a little heavier than normal speed squats, but not to a max.
So it can be incorporated, but i would do it for the opposite lift instead of the same lift.