I can tell you that after 218 hours in, In my opinion, Horses are a complete waste and need to be re-worked before I'll even touch another one. no joke.
Your play time doesn't affect my perception in any way, unfortunately.
I'm not saying they are flawless, they obviously need some work. All I'm saying is that they can be useful depending on how the player plays the game. Now, if you can't see that, I'm afraid there's nothing else to discuss.