I now have the Blockleys and they certainly talk,to you more than the Avons
They must have more grip as I feel I can now drift the back end very slightly on certain corners and now apply some degree of counter steer. I'm not an expert on handling and certainly never got my knee down in many years of biking. However it's obvoius tiff was driving like a prat for the cameras and did some dis-service to the 5 speeder. It will bite back if you over cook it or lose concentration on the wrong surface ( damp leaves) but that's part of the fun, isn't it?
However, is this perceived change in balance at least partly caused by the fact that your rear tyre is now a bit more worn? I am pondering this question in relation to my own M3W and I am really not sure of the answer.
Tyre technology is a dark art. They are not just "black and round". If, for example, you put brand-new tyres on the rear wheels of a rear-wheel drive car with well-worn front tyres, it can feel as if you have made some drastic change to the damping.
