I know this is useless but still...
1. Keep the current log in launcher but if you lose connection to the game's server, it shouldn't close the game, it should just send you back to the title screen like when the game launched. That way you'll save time if you got DC while doing a dungeon, raid, pvp BG. It isn't so hard to do, i don't know why the game should close itself, that's pretty stupid to be honest.
2. In F8 after recruiting your party members, there should be an option to decide if you want to appear inside or outside the dungeon after leaving lobby to speed things up, the same can be applied at the character screen selection, to decide if you want to appear in server map or just go directly to F8.
3. There are a few cases when cold storage or heavens mandate are on the Daily Challenge and you lfp but sometimes only one person shows up and decides to enter just to leave the party afterwards and the pt is disolved, so you have to go back to lobby and lfp again, that shouldn't happen, it should just show that you're the only one in the pt, like when you do raids, so that way you can recruit even if the person left.
4. Add an option for training dummies to pop up wherever you are, so you won't have to go to mushin's tower to practice, instead you can practice wherever you like it.
5. I don't know if the Asian servers still have this option, but when i played CN i remember there was a voice chat option that you can enable or disable. And i know what you're thinking... "that will just make the game full of toxic people making noises for no reason or whatever" but you have to admit that it would be pretty useful in BG for strategies when there's no time to type o draw. And like i wrote, you can enable or disable one specific person if it's being too annoying, he can still speak, but you won't hear it. Not everybody uses discord or any other voice chat programs and sometimes you just need to say things fast and can't afford the time to add people on discord and invite them to your server f they are not on your clan.
6. Increase duel arena HP. This is something that i personally feel the game needs, i'm pretty sure many players think one combo kill isn't enjoyable, the fight ends so fast that you feel like you just repeated the previous fight over and over again, you do your combo and the player is dead, ok, nice, but is it really that fun? specially when not everyone plays on the same region or have the same ping and if the other player has 50-80 ms and you used your escape, you can just sit an relax because you know you're already ❤ ❤ ❤ ❤ed. Unless, if combos can't completely drain your HP, let's say a full combo would drain 60% of your HP, that would still be a huge damage dealt to you but there's still chance for you to turn things around, that would be more enjoyable. Some players would like it and others won't, but that's to debate.
And that's it, those are the things i would like to be changed in this game. Feel free to give your opinions, knowing NCSOFT won't even care.