I think you will find the none based training was dropped simply due to complaints from the villages around the airport about the amount of training going on at the airport.....
After all a lot of the locals would start to wonder what the heck is a Virgin A340 doing flying round and round over your head disturbing your pimms and lemonade as you sit in the back garden when they do not operate from East Mids....
Also I would imagine most operators at the airport block book landings per quarter or similar, imagine the scenario of one of these airlines etc wanting to do circuit training and use some of their prepaid landings up to be told you cannot fly in the the circuit because an aircraft that does not operate from the airfield will be here doing circuits at that time..... no doubt that would also add to it.