After playing a bit more to try to master the game, I got disapointed by it's randomness
The problem is not the dices, but the events and upgrades between fights
You have to get lucky to get positives events at the right moment like replacing or discarding 3 dices, replacing dices is even more luck dependant, you rarely find something worth it in shops and picking one more dice is usually detrimental, and you rarely get to choose between a shop and discarding a dice, so half of the time you can't do something useful
It can be fixed, maybe events could have a patern like 2 positives one negative across 3 floors, the two choices could be forced pairs of shop and discard or heal and +3health, we could pick between 3 options instead of 2, and an option to replace one dice could be nice to see too
to summerize, I think that anything that reduce both the odds of busted and trashed runs would be nice for the game and give more importance to strategizing, and would allow to make every run counts