I had no idea what this race series was, so I googled it. I like the idea of urban short course, but there is no way you can call it MTBing. It is a whole other discipline. Keep original XC racing, and add this as another discipline. I'd like to try it.
Keep it, I prefer XCO cause I can't sprint for shit, but a few changes in the format and it'd be properly exciting! Also our (brits I mean) only real decent XC result recently has been Kenta winning an XCE world cup round!