Well, Gundam SEED has became more emo at Destiny (and even more at Infinity, IMHO) and it was I think one of the reasons why 00 has became more popular.
Regarding Shana III, it's either:
> We hope that the staff of Shana do not "lose their luster" through unexpected changes of crew and staff; or
> We must no overhype Shana III so that we don't get disappointed when the real thing hits.