It's too simple. With that logic, if you didn't like some combat animation, you shouldn't fight at all?
In a CRPG, atmosphere matters a lot for many people, and in my eyes, doing somersaults with plate armour and a two-hander strapped on your back can kill the atmosphere. Yes, there is magic in the world of Rivellon, but the somersaults apparently don't require or consume any magical energy. Since I haven't played the game yet, I can't tell for sure - however, it might feel like you're not playing a hero anymore, but a super-hero without a cape who is out of place in this fantasy world.
I'd like to switch off the somersaults if that's possible. But if it's not, I wouldn't want to run around for minutes to avoid a somersault jump, either.
