I dont know if its possible but i have a interesting rule that i play with my friends that allows for quicker games. We call it leech mode. Basically when a player puts a robber on someone elses hex as well as taking the 1 resource. Every time that number is rolled in future you take the resources that should be going there way. Until the robber is taken over and moved by another player. It makes for really open games from what we found it can literally turn someone from last to first in a few turns around and speeds up play massively allowing us to fit in more games when we play. Anyways just a suggestion. What does everyone think?