Considering just how many rolls are in the game, and how most of them are just for fluff, it should eventually cause players to stop savescumming as much. Trying to savescum all the rolls will just make the game an unenjoyable nightmare.

The witcher games tried to fight savescumming by not making a lot of consequences for your choices apparent right away. I think Bg3 can do the same with just a massive amount of rolls and by teaching players that a successful roll is not always the best result. There are too few of these cases in the game currently though.

Permadeath mode with only 1 save and if it includes autosaves as soon as a roll happens... It will be absolutely amazing.

But yeah, definitely do not remove conversation rolls just because many players cannot handle a negative response from an npc instead of a positive one.