People stop complaining
you shouldn't of assumed that you could ride dragons...they didn't promise anything
Imagine how impossible that would be to implement anyway.
As with spears and werebears, probably. I would think that in order to do spears and do them at quality levels, they would literally have to rework the entire flow and balance of combat in Skyrim, which is one of the reasons why I think Bethesda has yet to do them, and with werebears, that's a load of work, too, and it's possible that Bethesda deemed them to be "too redundant for inclusion" compared to other things they wanted to do. They might still try and get these things as playable for the PC, but at the same time, it may not happen, either. It all hinges on what they are able to do with the resources they have.
If they do spears at all, it'll most likely be a patch like mounted combat so that enemies all across the game might use the spears too (and so they can be expanded on as well), but I don't know if they're going to do patches like that anymore, however.