Eirik's post pretty much hit all the points I would bring up. I expect much of this to be addressed in the future as I have read Bethesda plans to improve on the game in more ways than merely DLC. So here's hoping.
I'd certainly hope they add at least 2 marriegable Bosmer and Khajiit. It'd be hard for modders to add dialogue that matched the ingame dialogue perfectly (and of course wouldn't help people on consoles at all). If the dialogue exists even if used for only 1 character it gives something for modders to work with.
