When I was doing full body I did abs after every workout. They're a regular muscle group, no point in working them everyday. Throw HIIT on your non lifting days, if you don't have time, put it after your lifting.
You're missing some things with the routine too, go back and read the choice of exercises because you don't have any deadlifts in your routine at all! You need deadlifts in there. Put in some pullups, chinups, and/or pulldowns and take out the upright rows. Put in some horizontal pulling like pendlay rows, db bent over rows, seated rows, t bar rows...etc.