No it's not! Developers are stifling themselves by adopting a very stifling combat system.
I think people fully understand the appeal of the Arkham combat system, even the ones who are very critical of it in this thread. It's an amazing achievement in balancing spectacle with the feeling that you're doing something impressive. Virtually anyone can feel like Batman with the Arkham combat system, it's a remarkable achievement in that sense. With that said, assessed purely in terms of quality
as a combat system, it's not a particularly deep or interesting combat system. This is almost objectively true; the Arkham combat system is accessible and liked by a lot of people precisely because it's not complicated. Simplicity is the appeal. That's the tradeoff the developers decided to make.
Look at this combat video from DMC4:SE:
https://www.youtube.com/watch?v=PhP7itgBNMQ
And compare it with this from the Arkham games:
https://www.youtube.com/watch?v=S_sHV2MMe1Q
DMC has a far more complicated and intricate combat system that allows far more player expression. People can study it for years and still not master it. You can play Arkham for a few hours and pretty much understand everything it has to offer. DMC has a better combat system qua combat system. But it could never quite have the same mainstream appeal of the Arkham games.
Whether you think the trend of Arkham combat is a good thing is another issue altogether. I think it's representative of an increasingly homogenous approach to game design that favours spectacle over skill and that requires almost nothing from the player. It's a trend that creates forgettable, pointless experiences. Of course the guy would personally prefer different design constraints. It's a forum about games and game design. Your post isn't an argument, and it's perfectly valid to dislike degenerate and increasingly simplistic game design.