sometimes you dont know there's an issue with coding until it's launched, no need to be rude about it. they'll fix it.
Will the items remain in the showcase or disappear once combined into an avatar? If they disappear, do you only keep them once creating an avatar?
that is to say... more drops than regular parties, and they drop consistently as opposed to switching each day.
The more difficult a party the more drops you get. So in a way yes since the more difficult a party the longer it generally takes.