Or how about cutting words for the bard ability? That's a reaction that will come into play on nearly every roll.There's indeed many "exceptions" to the usual flow of the turn. As in, "I want to use my Indomitable to not fail that save". Which means, the game UI and flow must give you a chance to act on every potential failed save. Same with certain reactions... even damage rolls! it is a bit nightmarish, tbh
Yeah, that one is tough. There are modifiers to the natural roll, like that one, and others, that can be called upon any roll.
Any cRPG based on 5e will have to choose between ruleset faithfulness, and gameplay flow.