Surprisingly - FKG has rather fast stamina recharge. Believe me, those 3 minutes for one stamina point are nothing.
When I compare it to some phone games of similar fashion I used to play (like Chain Chronicle, or Grand Sphere) where the stamina regen was 6-8 minutes, thats when it gets really bad. The recharge rate FKG has is actually quite good.

Rather than that, I would be happy with some decreased RNG in event mission of 80 and 120 AP. Its bull to force the player to repeat mission like these again and again, only because of over usage of the "random movement" nodes in the map, considering most people will be able to run a 120 stage about 3 times with all gathering points spent on it.
Thats no fun. No fun at all

Also I would like to see the Gathering recharge time being reduced from 2 hours (120 minutes) down to 100 minutes. If you dont start in the morning (around 9-11:00 AM) it will be very hard to get the Gathering Quest completed, granted you dont have infinite time to burn (no work/school day etc).
Last thing I would like to see Is a performance patch. The game keeps chugging and lagging on some maps, and sometimes it even causes "non response" error and crashes. I have rather solid PC that can run good amount of normal games and software yet this browser game keeps grinding my gears with how laggy it gets most of the time. I am running the game with Mozzila Firefox, but I do not think the browser is at fault here.
My two cents contribution regarding this topic