I think it depends on the individual artist. Some great stuff is done in Carrara while others seem to struggle with its modeling. The fact that Amapi is encouraged (greatly) to use as a companion product with Carrara gives credence that Carrara may be lacking in its modeling abilities. As you put it, "or will it always feel clunky and ill designed?" (it kind of does for me too when it comes to modeling) Maybe Amapi is the key for you for a modeling solution? I tried Amapi Pro demo and was very impressed. I personally think all of Amapi Pro's modeling abilities should be incorporated into a Carrara application. Say Carrara Super Studio or something. (-: