i ahve an problem with rebounding, too.
I win the rebounding duell 78-53 with similiar ratings, with a rebounding 3 PF and C who both gets 15 boards - the rebounding of my opponent wasn't that strong too bot he plays with real C and even on PF i expect an advantage in this area from him:
(12734032)About blocking, in my eyes the amount of blocks increase, about 33% which is good but still it is mainly a Guard/SF thing.
And even it is an improvement, i believe you could reduce the impact of blocking in salary too, because it will be still overpaid but if you raise the impact it maybe wasn't fair for people who train for the old system and have centers with less blocking.