You really can’t. The floating widgets remain. The highlighted borders remain. The added visual noise in general remains. Reduce Transparency also reduces contrast in many instances. In addition, it has display bugs in various places. You have to deal with a mess of a UI either way.
At least they fixed the horrible banding issue with the latest update. However now there's a new bug where if you move the widget too many times it not only crashes the widget but the entire OS taking you back to the lock screen.