I don't think it will be harder to play. I think it will be harder for people who were already struggling because this change doesn't help anything in terms of the visual design of the class. You'll have just as much stuff to look at, so you removed it for no reason.
Also, I don't need you to explain to me that you could drop the enhanced combo finisher. You can look at my logs if you wanna know how much I know about Viper. But is it really so bad that it was not good to just spam Uncoiled Fury for no reason? Was it really that bad to have to keep track of your combo finisher's timers? Dropping it only lost you 100 potency. Why does it have to be IMPOSSIBLE to mess up in this game?
I LIKED coming out of Reawaken and having to choose between using Uncoiled Fury, Dreadwinder, or continuing my combo. I LIKED looking at the timer. I LIKED having to think about LITERALLY ANYTHING AT ALL. And regardless of your thoughts about Noxious Gash, it was one of the only things this job had to do in filler.
This change is buns.