I think the main appeal of viper remains, its the weakness dot didn't make it 20x more advanced then it is now.
The appeal of viper is that its brainless constant button pressing job, short recast time remains so the main reason a lot of people play it is still there. Its not a very skillful job nor a hard to learn job its just a constant button pressing job where you press similar buttons over and over, you're not really managing anything besides the coils which don't build very fast so you don't have to think too hard about them, It makes it a very easy melee job to prog with and to improve at encounters with because of coil being a strong range option. It really is a nothing burger change, Viper never needed to be changed thats reflected in this change since the only thing it really did is make you rotate the first button in the chain.

I do think its shitty that CBU3 did this though, because the change was obviously preplanned during 7.0, there isn't any placeholder like images for the new buffs and the yellow sword glow was added fast. CBU3 took 10 years to add a buff timer in your party window they do not do UI stuff like this fast. They disguised these changes they wanted to make (because they have zero confidence in their job design anymore) through pretending that these were changes we asked for, NO ONE asked for changes for Viper the job literally just came out, we didn't even get to try it in savage. If the dot was problematic those complaints would of come up during Savage/Ultimate not Extremes, thats what annoys me more then the change.
The fact CBU3 is obviously embarassed about releasing a job they deemed unfinished they tried to gaslight us into thinking we asked for it.