I have been re-reading about your defence and shot block theories lately (without much success); let's see if I can get it right next time.
It takes a lot of training or luck to find the right players. Take my Poom. He is cheap and almost every manager would sort him out. But for my team, he is important. Rebounds, Blocks and Assists. He plays kind of a Point Center role in my team.
At my german team, I have a new little experiment. I'm building a PA 15 Center. A better version of my Sutherland (two seasons ago nr. 1 in Blocks worldwide). And this boy will be a real Point Center.
It's a lot of try and fail. With Haek, I have the best defender BB ever saw. But he needs more stamina to maximize his defense. It took me several seasons to find out, what stamina really does and how it influences the skills.
Even now, Ettig is nothing more than an experiment ;) I had an idea how a player should look like for almost every offense in BB. Backed it up with stuff I already knew from BB-posts and own experience and started building him. Next season he will be finished. A pot 6 with ~105 skill points. A solid bank player for the next 10 seasons