The job has lost none of its nuance or difficulty, the primary difficulty in Viper has always been managing your positionals and knowing when is the right time to use your reawakening and ranged combo
none of that has changed. The only thing Noxious gash had was a rather inconvenient debuff to manage. The decision was either extend the duration or remove it, and they chose to remove it.
The only weird change imo was with the base combos now being rather samey with the 111 222 111 222 stuff, which now it feels like why not just make the whole thing one button instead of 2, but it's such a minor gripe to have when the job plays pretty much the exact same.
Your rotation and priorities are basically identical, without the need to reset your debuff. You can still hold onto your resources/cooldowns for raids buffs and damage windows, there is nothing stopping you from doing that.
(personally I think we should move away from the 2 minute window garbage anyway)