Impossible to answer re bouldering grades - better to set specific problems as goals. In terms of pull-ups 5-10 perhaps?? I expect you could as many on edges as a bar. It could be in part a neuro thing where your body has forgotten how to do them. How many did you used to be able to do ?
F: Went to Baslow to try Flatworld. Did an awesome V4 called the Balls test, well worth seeking out.