I don't think it's a bad thing to have the options available as separate purchases. The choices of how to handle the full outfits are odd, though. I gather this is Korea gear that has come our way and that's how it was there and also received complaints.
In regards to sending nasty messages to people who buy from the Mogstation, I am not their parent. I do not control their money. I don't want people harassing me about what I spend my money on. I don't do it to others. I control myself and myself only and find what is and isn't worth my purchase. This is not worth my purchase so I won't be buying it.