Well. I would rather prefer to not have those tooltips altogether. In a real DnD game you never would know if you would need to roll anything before choosing the course of action. Knowing the DC is so meta-information that it defeats the roleplay aspect of the game.
I think the best solution would be to have a setting for that. With 3 options:
1) Hide warnings of future dice rolls
2) Like it is now
3) Show DC or stright up chance to saccide
