I would love to be able to upgrade the guilds or the blades HQ like you do your house, i think it would be cool to see your efforts make a difference. Its just a thought im not moaning about anything just thought if people would agree or think it was silly?

I think it's too late for that. It wouldn't be released as a patch. And it would be lame as a DLC. It would have been relatively nice as release content.