So I bought i7 4790k yesterday clocked at 4.4ghz my fps increased from 20ish to 40 or more. CPU bottlenecks this game. A bit research into it, looks like FF actually utilizes hyperthreading but only from 1core. in task manager it shows usage on 5 threads, thread 1,2,3,5, and 7. Ht is used on first core only.
No I didn't buy it for FF, it appears my i5 also bottlenecks in witcher 3, got annoying stutters due to fps drop in crowded places or when running. i7 fixes it all. Also it looks like witcher3 utilizes ht pretty well, all 8 threads are used in that game.