Composer99
Hero
I mean, the text of legendary resistance is, "If the <monster> fails a saving throw, it can choose to succeed instead." If you narrate the result via game mechanics, such as, "<the monster> succeeds on its saving throw" despite a bad roll... I don't really see the problem here? It lines up with the rules text of the ability.So you would use LR but then tell the players that the monster succeeded on their roll? That feels icky to me personally, but I'm not judging anyone who uses that style. We roll in the open so that isn't an option either way - you can't exactly roll a 2 and pass it off as the monster passing their saving throw
I guess there's the meta information being given that the monster has used one of its LRs for the day, but at least at my table that wouldn't be an issue.
Apropos of the thread topic, put me down in favour of replacing legendary resistance with burning through legendary actions or some other kind of "action-denial-lite" that tangibly reduces a legendary monster's action economy without completely nullifying it, so that if you land that slow or hold monster or what-have-you, you're still doing something.