Yes. They were in Morrowind and fit in perfectly. The fact that there was no crossbows or spears in Oblivion was just laziness on part of the developers.
I'd actually say Morrowind's implementation of them was pretty half-hearted at best, there was much less variety than with longbows in the game, and I don't think there was a single artifact crossbow in the game. And really, all that set them apart from normal bows was that they reloaded slower and their minimum damage was the same as the maximum, meaning that you didn't need to hold down the attack button for a certain period of time to fire more powerful shots, that, and they used bolts, of course.
Now, I don't feel this justifies them being removed, because I don't like the "It was done poorly, so it should be removed." mentality, if something wasn't done very well in a past game, the solution should be to improve it, not remove it. But since Bethesda apparently applied that logic for other things as well, I can sort of see why crossbows were removed, when one considers it in that light.
But I don't really have strong feelings on crossbows. It would be nice if they were added in, but in games that have them, they generally become that weapon type I almost never used, I might use them a few times just to see what it's like, but for the most part, I'll probably stick with bows. And if they're not in the game, meh, I don't feel that it's any big loss, and in fact, I'd be rather annoyed if we got crossbows but no spears, because spears I actually care about.