accumulative XP gain bonus for each level 50+ BNS character

You'd make so much more from your non-whale players that would buy costumes, and other things for their alts if the game wasn't so alt unfriendly. Here are some suggestions:

-Have all chars on your account automatically added to your friends list, and have mailing between them free, or just add a shared account storage tab. Account storage Blade & Soul Gold would even give you the chance to sell more storage expansion items.

-Let us add alts to our clan if we have invite privileges, Buy Blade and Soul Gold this would be especially helpful for those one person clans.
-Give a small accumulative XP gain bonus for each level 50+ character you have.

-Make items used to upgrade equipment (evolution weapons, powder, XP gems, materials, etc...) account bound, not character bound, and without requiring a cash shop item to send them like costumes do, it could cost gold, as a new gold sink, but not real money.

-Have market restrictions applied to each character, not your account.

-Let us move skills to different hotkeys, as different classes, have equivalent skills, but under different hotkeys (ex: ones that knock dazed/stunned targets into the air) which makes playing multiple classes harder than it should be, as we're effectively fighting the UI, and learned habits.