Your point 1) makes no sense as that is not how F4 works. F4 can never be cast with proc from F1. It's only requirements are Astral Fire and Enochian.
2) Firestarter is still a thing, it's the only way to get 6 f4's off in your opener. And it helps in your second rotation too.
3) It's inevitable that sometimes you won't know what state you're going to be in every time you case F1 with Astral Fire dropping off.
4) AF does run out during transpose. It's annoying as hell. It runs out during the animation before granting UI.
5) It's pretty hard to tell if you're going to lose Enochian or UI or AF during cast as sometimes 3 seconds remaining is enough time, sometimes it is not.
Further the lag time on the F4 proc after AF is annoying.
These are QOL buffs not skill affecters.
It's not a skill problem, it's a latency problem.
