1) Removing the pause key.
In Massively Multiplayer Online Games, pausing isn't available, yet on graal, it's easy to "cheat" by using the pause key to avoid death etc..
2) Automapping.
It would be nice if the heads of players in the "black" zones wouldn't be shown on the map, only if you already discovered a place that you can see who's there.
3) Automapping. Again.
Another improvement would be that automapping isn't an option, that it's always active or in the server options. That way, if we want to hide isles/continents from the map, the players will have no possible way of seeing them
4) Automapping. Last one. 
I'm not sure about this one, but making a script command that reveals parts of the map, like when you look in a telescope you can reveal all of the map around you, or if you "buy" a map showing the water around continents or a map showing where a mountain is.
That's all I can think of for now

Feel free to comment on those improvements I'd like to see
