Idea 1: Enable players to change the orientation of their door so the thief can start out going right or left. This could be identified by looking at the door to see which side the hinges are on. For example, currently the hinges are on the left and the thief starts out going to the right. This change would allow for the hinges to be on the right side of the door with the thief starting out moving left. This decision would be made by the dungeon designer/owner of the dungeon.
Idea 2: Allow for the guild leader to reward his guild mates for doing a good job. Maybe have a small pool of orbs, say max 25 per arena, that the leader could give, and only give, to his guild mates. Maybe the leader could only give out a max of 5 at a time and could only give once to each guild mate per arena. I think this would allow for the leader to incentivize those who are dedicated to the guild.