TC, people unfortunately have to buy this game because if this sells badly they'll probably pull the plug on the whole Devil May Cry series. I'm no fan of the game myself but you can't really stop people from buying the games they want.
Sorry but that demo is too much fun to not buy this game new. Been playing Devil May Cry since 2002 and I really like where they are going with this new reboot. Makes me feel all excited again like when Bayonetta first came out.