The StrongHold main hall is great...but so empty! Is it possible that as the Guild goes up in level, that you start to have NPC's occupy the hall, just like they do in the rest of the SH? They could wander in and out, spend time admiring the artwork (or make remarks about how bare it is!). It would also be great if there was an extra quest giver in there - maybe an envoy from one of the other major cities beseeching the Player/Guild for help for some problem or other...
Might is not always right - the powerful sometimes forget that.
The Small Band