I guess I may be alone in supporting trans-server allies, but I still like it. When I left classic for era, I left several people behind because I use the guild chat system much more than pming. It would be interesting if all the iPhone servers could have "outside allies" which don't affect the ally count for allies within each server, but could be used just for chat. I guess it could be weird when talking about server specifics, but it doesn't have to be utilized by every guild/gang/squad.
On another note, you (@Jester) wanted to remake your gang Lapse into a squad. What if other people want to do the same with their guild/gang but don't have the time to get zone upon its release and the name is taken? Using the same database, people could rename their previous guild/gang then afterwards make their squad. I guess it wouldn't affect most players, but some popular groups might want to stick together under the same name and move to other servers.