As the name suggests, I think you should be able to customize the layout of your guild hall. Even though (also as the name suggests) there is no way its ever going to happen.
Customizing the Guild Hall to the strategy of your Guild would make Guild Halls much more interesting. Also, I think you should be able to buy things to add to your guild hall for entertainment or convenience (e.g. Guild Market, Guild Storage, Guild Contests, Ect.) At my guild hall, I just sit in the fountain and play rock, paper, scissors.
Customizable Hall (No chance in H&ll, but still...)
thetrojansheep
Sleazy_D
Customizing the layout of the hall could wind up with you making it far too defenseable in GvG. That would be a problem.
MoldyRiceFrenzy
still it would be pretty sick