In short: Improvements to the 2010 course have not been for the better In full: Why change the route between 6 and 7 miles and worse still between 11 and 12 miles to incorporate ridiculopsuly steep hills, this killed all momentum and in the main seemed to demoralise many. Many opted to walk these hills which hampered those with best intensions. The 2010 course was far better, no chance of a PB with such hills. Factor in the risk of injury to already tired limbs on the final hill and it makes no sense at all.
I'll be thinking long and hard about entering the new race in September or coming back next year