I think the guildwar system has room for major improvement.
For instance: the alliance and enemy system. Having those in working order would be a major credit to the community. Loads of GL's are writing down their ally's and foe's in their bulletin because those systems are not an option.
And lastly i think, if possible, that the Deputy Leader bug should be fixed. Ergo; DL's should (in near future) have the power to invite and accept members into their guild. All guilds are now fully reliable on their GL's.
That was about it, let me know y'all