I'm going to repeat what I'm saying in other threads on this issue:
Viper is literally much better now actually and here's why.
The low timer (20s) on noxious gash caused many vipers to fall into the bad habit of just rotating dread fangs combo to keep the debuff up instead of doing the better Steel Fangs starter for higher potency. When you go into reawakening, you also can't reapply noxious gash during it either meaning you had to play around making sure the debuff was up before you reawakened, making double reawakenings very annoying and the theoretical triple reawakening a near impossibility.
The other issue was when you needed to peel off a boss to deal with adds or another target etc. you HAD to just start a new combo to apply noxious gash or use dreadwinder on it. It felt very VERY bad for a job whose primary draw was getting into a constant flowing rhythm. The INTENT behind the debuff was it would fit into that constant flow but due to how the nature of it being a debuff works, it ended up feeling like hot ass (plus the duration sucked)
Viper was always an easy job. Noxious gash was just the biggest complaint because it's an annoyance (note: I don't like reaper's death's design either but the debuff timer on that is longer and fits better with reaper's comparatively slower GCD and rotation.
For all intents and purposes, Viper plays nearly the exact same, I'd say it plays even better without having to worry about the debuff falling off, and with the buff timers now at 60 seconds, you can maintain your flow past some lengthy phase transitions.
If you're crying about it you never played viper outside of leveling it 80-100 and brainlessly spamming roulettes.
Does the job feel like ass in low level content? Fuck yeah it does, but so does everything else and that's a fundamental issue with the game that's not gonna be solved anytime soon. Beg Yoshi P to let us keep all our skills when synced down
TL;DR it's the exact same and honestly better, you did not seriously play viper if you think the noxious gash change is bad. The job was not made easier, just less annoying, it was never hard, it was always easy.