I got one of the costumes. I personally think it's a nice change, it adds more character design option..at least a little..because everyone looks like exact clones from each other as is. More so now that apparently you can't even change the physical appearance nor the height of your character. Anyway I digress..
I rolled the costume and got 4400 HP, 32 STR and 32 Wis. This was on my first attempt and after seeing that HP and STR I didn't wanted to roll anymore. After reading this post that there are rumors saying 9k HP? Yeah, got to draw the OJ cap somewhere.
I would not mind if you remove the orange stats, as many have said, this is meant to be more for looks and appeal. If anything, like someone suggested, have some basic stats added. Moreover, if you are to remove the OJ, we can therefore expect this costume feature to be worth much less than 5000AP.
At the end of the day this is no different than having that merchant who changes your cape logo and color in game. If that's available in game for in game gold purchase (for everyone), I don't know why there's no such an NPC who could change your armor color, appearance, etc just the same. This game lacks a lot of character design/options.