Why bother with a faction base?
1) Ammo
2) Base Buffs
3) Base Blessing
4) Ancient Emblems
5) Guild Trials
6) Faction Base Goods - Uncannies, Raptures, Exp Scrolls, IGs, God Stones etc
7) DS events
As for the other features you mentioned, in a ideal world, would be great.
However there is only so much Aga can do without PWI doing it first.
He can't pull these exclusive new features out of nowhere.
I supposed you could add a few other things for contri and such
but because everyone and their mothers
have alt guilds and a bazillion alts, it is easily abuse-able.
I think time is better spent elsewhere.