Harada probably wishes he didn't even have a Twitter anymore. It gives people way too easy of a medium to constantly berate him with requests, no matter how much he has already given us.
I totally agree that customization is lacking, but it is only aesthetic and has nothing to do with gameplay outside of stupid items. Bug him for more important things, like character changes or additional modes if anything.
"Don't be single-minded. It will only serve to bind you later on." - Faust