We all know it's been forever since we've seen the old Mystic Messenger interface. 

I think it's time for a change. The old interface highlighted the fun and innocent original feeling of the game, before a player would get to a more serious route and find out why the game has since become rated 17+. 

I personally feel as though it added to the player's experience. 

With the amount of new players starting the game, it may feel a bit too serious for an otome of this nature. It also kills the vibe of the game. As soon as you open the main interface, it feels as if Jumin Han created the game, as many older players know he didn't because of the clean and serious look of it. Given 707's playful vibe and nature, bringing back the old interface would let the player feel more immersed in the game and feel more as if they were talking to real people with real personalities than they are already meant to.