I'd love more communication between my alts, since they're mostly just storage at this moment. Just friending them would be enough. I've gotten complaints about my use of the FC box for transfers because it spams the crud out of the log and makes it harder for the leaders to keep track. Shared housing would be nice too.
and in my opinion I DO pay more for having alts, just because the way you pay is limited doesn't mean I am not paying more for the privilege. I had to make a conscious choice to pick the 8 char sub. I could have payed less, but I don't. I pay more because I want those slots.