Hello. Please don't take this the wrong way. Maybe considering the work you put in, people don't want to risk offending you, so maybe they haven't responded. I don't normally enter the competitions. But I've had a look at this and I think it's just a bit tricky and possibly low action. I don't know really know what a lot of the good young horses are going to be so I can't initially select them. It's very easy for horses to get injured, so I might only end up with 4 horses running for me. I usually check out Saturday's fields in Friday's paper, not on the web, and then its too late to make any changes for Saturday. So some suggestions are more action = more stable horses = even being able to increase the size of your stable each week.
Also have you thought about rewarding people for the amount of prize money their stable wins?