My idea is to expand castle building by changing the default texture to wizard city bricks like on the shops in shopping district and allow it to be dyed to create dark stain or white or red like the streets of wizard city and also adding new blocks like castle walls and pathways and allow when in a enclosed area it can gave wallpaper put on it and my other idea is to create more ambience to wizard city by creating moving npc wizards like in wysteria and allowing toys wizard to play games with npc wizards to unlock allies to trade with the npc.
And using a flashing count down screen in the center of your screen from when in team up so people can know if they are accidently in team up still so the other player does not have to wait another 10 minutes for the timer.