Although we can't order one for a few more months, we're doing as much research on the 2304 KS as we can - and that includes e-mailing Forest River with an assortment of questions. Brett Doberenz has been great about responding, even though this is show season and he's out a lot.
Anyway, among the things he's told is is that the kitchen slide system is a Schwintek - and didn't I read somewhere here that FR has addressed some of the problems people were having with that system? - and that the spaces under the dinette are 10¾ x 16 x 17 and 40 x 22. Not sure which of those is the height, but can probably figure it out from pix; if not, I'll double-check with him.
The people we bought our current FR from are not the absolute best when it comes to service - mostly just achingly slow if they get back to us at all - but so far, "headquarters" has been really good.