As you know, there are some events where the player has to roll some dices to succeed. I love this mechanic. The problem is that there are some events where the main explorer is trying to achieve alone a thing but the dices are for all the group. This happens, for example, in the native competition (all the group helped me even when the event stated that I was doing it alone), the poker game (the companion who was playing against me was granting me his dices) or the lifting of a tree (the companion who was under the tree was helping me). For that reason, I think that some events should forbid the use of the dices of some companions. Maybe you should reconsider the idea of adding a joker dice with all faces in it if the player doesn't have a dice that matches with the requiring roll.
What do you think?