Your right, I shouldn't have put the part where he would become a full vampire because something like that would require him to be a natural born vampire, but he does have a vampire form, however, he isn't a pure blooded vampire though. I would love to see Tsukune's full power when that time comes.
Something similar to Shinso vampires? Now thats what I'm curious about. Now that he is a modifed-human who has inherited the Shinso blood and it's title. The question is that when the time comes that he would become very similar to Shinso vampires, would he be superior? or inferior?
I can totally see Tsukune becoming totally OP.