I didnt say they were "more costly" i said they were costly. Simply put. The task of making animations for ground movement, combat costs X. The task for making animations for swimming, water combat costs Y. X may be larger, equal, or smaller than Y, i don't know, and unless i'm a professional 3d animator, which i'm not, i can't tell. What i do know, about project management, is that if something costs 500 implementation hours and is not on budget, then you won't do it. Does this sounds plausible to you people ?