One thing I'll add is that there appears to be a system to reroll on certain failures - Inspiration points? - but I don't think it's documented yet. At this time, I think you get them for completing certain quests. From memory, I also think I've seen choices display different kinds of checks when you mouse over them (the dice are green maybe? It's very infrequent) and they imply you might make the check on two dice or something, yet are written as checking on 1D20 (so, why even have a different tooltip?) It's possible that there's a bunch of dice check mechanics that aren't implemented yet.

Being able to expend resources to reroll dice would help, of course, but it's only really a bandaid over the actual problem.