I was just looking at UW Control.

True, the static ability is very relevant. However, I question the actual utility of the other modes. How often will you need/want to cast sorceries on the opponent’s turn? Also UW has Resto and frequently Flickerwisp to reuse everything as is, do you want to jump through the extra hoop of recasting it?
Additionally experience with UW Midrange, and this was years ago, is that the three drop spot is packed. It seems like Teferi will be at least decent if you’re ahead on board, but if not then it doesn’t do enough on his own to catch you up.

That is certainly possible. The disruption isn’t exactly universal but could be potent in the right place and they could be sideboard material in the right matchup.
The problem is that DnT’s three drop slot is incredibly crowded. Between Flickerwisp, Blade Splicer, Thalia, Heretic Cathar, etc, its already very easy for hands to get clogged and the deck to clunk out. It’s worth some investigation, but I’m skeptical.