I think the Cas situation is completely different. Their stadium is contingent on the shopping centre getting built, and doubts are starting about whether it will happen. In our case, Newmarket was ACTUALLY built and we got mugged.
I'm not sure I entirely agree with the view that the retail sector is hampering things. Retail habits have changed, but you get the impression that it has hit the high street more than out of town retail parks, although I'm no expert. The issue might have been more to do with securing finance because of Brexit uncertainty.
But then again, I'm only guessing.