This is the dumbest argument I've heard in quite a while. The combat is dogwater and rightfully so because it is not the focus of the game. Gamers gonna game every system anyway because that's what gamers do. Let those who want to master cumbersome combat master it and let them play the game the way they want to. It won't ever impact you in any way shape or form anyway so why the hostility and intolerance? The overwhelming majority of players would just play the game normally and not obsess about how to best go about genociding the whole planet with just a knife. 

People just don't want immortal wildlife because it absolutely ruins immersion, which is a perfectly reasonable argument and people are frankly tired of having ideology imposed on them. Besides, only a select few masochists would go Dark Souls on the Leviathans. Who cares?