I miss this game and I miss the community. There are a few big things that always bothered me, though. They're mostly based upon the designers/developers' philosophies, so it's unlikely that they'll be changed.
1. Game mechanics need to be more transparent.
Murky game mechanics are supposed to put an emphasis on roleplay, but this is not what actually happens. Instead, OOC chat about game mechanics is fostered, and enfranchised players have an advantage over new or independent players. When players are given information about game mechanics, they have fewer feel-bad moments when they realize things don't work as they had expected. Intuition is just not enough.
2. Roleplay enforcement needs to be made a bigger deal; the best way to do this is also transparency.
What's expected of us as roleplayers by the designers simply NEEDS to be well communicated. I remember when I was involved in a Rogue's Guild plot where I believed that my small group of player characters were important enough to decide upon the entire course of the Guild, I was put in my place by NPCs and code developed by the guild wizard in order to reign in our rebellious roleplay. While I was offended then, I would not have been had I understood the expectations and had the tools available to not act out of line.
That's one example, but there are others. Discussion about design intent and exploits should be done transparently, with the assumption that any true roleplayer intends to play within the intent of the designers or at least argue why not. I would feel better about playing the game if I knew that people could be trusted to know what's expected and know that going against it would lead to confrontation or consequences.
3. Support for OOC discussion instead of a vague disapproval of it
Simply playing the game does not give the full experience, and there are so many stories that are effectively private. What makes a roleplaying game is its stories and its characters.
Concrete rules and a safe place for OOC discussion of actual game events and content would bring me back. I could participate in the game without being a full-time player, and I could share my fun stories without fear of repercussions (the two major ones being the fear of IC cheating and Moderator backlash).
We should be able to have an OOC history. We should be able to have discussions about good and about questionable roleplay. I want to have meta discussions about the roleplay, not just the game mechanics.
Those are the major things that I always wanted when I played Geas. I got what I wanted in unapproved channels (Messenger communities, etc), but this does absolutely nothing for players who are not enfranchised while also feeling vaguely reprehensible. Instead of making us whisper, let's talk in the open and work together to build the game we want.