I often have blurry dreams too, maybe it's just not vivid. If you want to try and improve this try and look at your hands or say to yourself "increase clarity now" ect. Nothing to worry about really, just something to work on.

With the talking, again it could just be your control. You'll get there eventually. Try and concentrate on your mouth moving in the dream and your voice. Then try and move your mouth and say something. You should get there eventually.