Viper is not hard, and does not need simplification.

[Rhael]

But back to the UI, ultimately the job is designed on the assumption that you'll be relying on cues from there.

The UI is designed with that assumption, but not the job itself.

The moment you try and graduate from needing the UI as a crutch, the job actually takes a disproportionate amount of work to become comfortable with. I can see how other people would view the job as overly complex in that regard.

Vipersight is useless outside of tracking Uncoiled Fury charges. If you need the level of assistance from the UI that the job gauge seems to believe players need, I would strongly suggest working on your mmorpg fundamentals. Develop an understanding of how weaponskill combos work, how to pay attention buff and debuff timers, etc etc. Viper requires a disproportionately low amount of work to become comfortable with. It's very simple, but it requires at least a functional understanding of the basic aspects of how FFXIV (and the style of mmo it's based on, eg wow/swtor/rift/etc) plays.