I think it is a good choice, if you are consistent enough with it. The difficult part about that is turning around for the utilt and starting it immediately. If you can do it, it can save you the hassle of trying to uthrow->uair on characters that can't be waveshined (eg, puff).
Drill->jab is a choice I dont think about very much. As long as your dair hits all the way down, your jab will connect in their hitstun so they can't CC it. They can still ASDI down, though, and while I havent tested the percents I can only assume that jab can be ASDI'd down until 100%+. I think drill->jab->usmash would work if you they dont expect it or you don't do it often, but it does have a counter.