As there are updates on the production line in Korea, some of my suggestions for rescuing the game in the west are:
Emptie the F10 cash shop.
ONLY put outfits and fashion and weapon skins at a fixed and fair price and without gambling into the F10 shop.
Focus on new outfits and fashion for the F10 Shop if you want to make veracious money.
Remove gambling events like Trove or random lootboxes completely from the game.
Stop any actions and ninja nerfes that milk the players money.
Make all enhancement materials easier to get by only playing the game. One should reach every goal in foreseeable and realistic time.
Raise the chance for good loot.
BNS should not become a second job.
Raise the gold in the daylie quests.
Make easy mode easier without insta kill attacks. Reward HM even more.
Talk more to the developer in KR, test your build, even if it delays a patch, and talk more to the community.
Tell the programmers in Korea that there is a different gaming mentality in the West and a rip-off program is not working well here.
These are just some suggestions. I also apologize for my bad english, I only speak german.