I'd love the ability to define rules for the Segmentation as a whole, rather than end up with a big default bucket.
For example, I'd like to have a Segmentation for Clients by Industry.. Right now, (as far as I can tell) the default would be everyone who is not a client or whose industry is blank. By having some basic rules at the segmentation level, then I can better "chunk" my database, and make the segementations work a lot better. If I could define a rule for the Segmentation as a whole (e.g. everyone in my database who is a Client), it seems like it would work a lot better than having to carve up my entire database every time.