I was cordially up for the City/Region based comp in the UK years back when the all the talk began.
I figured that 6 regional based sides competing in a T20 comp over a short period (3 weeks?) featuring quality overseas stars with the England players available would be a worthwhile watch. The 6 sides would all have a 'homegrown' core, for example a Midlands based squad of say 17 would be made up of 14 players from Warks/Worcs/Northants and then 3 absolute quality overseas players. Something generally along those lines.
The Midlands teams home games would be played at Edgbaston/New Road/Wantage Road, take the comp around the counties, have all counties involved, all grounds involved etc. The Regional based teams would still have a homegrown, local feel. Something like that.
Could still play the CC or One Day Cup alongside it but they'd be no situation where some counties are missing 10 or 12 players and other counties arent missing any to the Regional based comp unlike the current set up which uses a draft/auction type way of making up squads (pretty average looking squads as far I can tell from looking at the Hundred website too I might add...). For example this Birmingham Phoenix team has a distinct lack of locally based players in it.
They lost me with this hundred ball concept though and other rule tweaks. Not to mention having 8 sides based at 8 grounds and shunning the other 10. Its a blatant cash grab.
I just don't get it.