CCM 4.0 doesn't have Forced Authorization Codes or Client Matter Codes, which is found in 3.3.4 (not 3.3.3 or lower).
However, CCM 4.1 *does* have Forced Auth Codes and Client Matter Codes. There was a stipulation where if you were at 3.3.4 and you upgraded to 4.0, you would lose those two features.
Is that what you're referring to?...
To my knowledge, they didn't remove any features from 4.1, they added a ton, though - MLPP, real hunt groups, real-time CSS/RP updating, etc.
TMH