1) A better way to manage breeding requests for my stallions. My news icon pops up nearly every day and it's annoying. Perhaps a way to "accept all", and the ability to pair my stallion to my mare even if the stallion is already engaged (you would need a queue system for Stallions, and my owned mares would automatically get pushed to the top of the list, so they breed in 14 days time..)
2) Better AI for breeding pairings. The amount of times I see a 5f wonder-mare paired with a 2m stallion that couldn't win a handicap is a bit silly... it's probably not helping the game gene pool either.... there comes a point where the only good stallions in the game are the ones I own, or the cast-offs that I sell.
3) A way to manage my breeding mares and stallions.... ideally into groups..... e.g. so I can group together my sprint mares, so I can group together my key mares and my "bad" mares that I'm only using to test new game-owned stallions
4) Horse of the year awards to be more sensible, e.g. Stayer of the year not to be a Melbourne Cup winner rated 95, when there's a superstar Yeats or Stradivarious type mopping up all of the G1's
5) Tweak the retirement rate of foreign owned Stallions....... I play the UK Schedule and the South Africa, Singapore, Canada stallions etc have a very high probability of being retired without going to stud. When they do go to stud, they have a very high probability of being retired after 1 season. This is totally unrealistic for multiple G1 winners.
6) Make it possible for foreign yearlings, 2yos, breeding mares etc to appear in the sales. There are often some real dynasty families that keep winning all the G1's abroad, but it's very difficult to get a piece of those bloodlines (exasperated by the stallion retirement rate)
7) Reduce the requirements that must be met before game mares will visit a new player owned stallion. If I retire a 30x G1 winning Stallion and set the stud fee to £1000, I would imagine that I'd be inundated with offers...
Stronger AI dynasties, whether trainer or stud based.... it'd be nice to have a bit of rivalry, you know? Why not have a trainer / breeder combo akin to Coolmore so I can fight it out with them...
9) Better balance for feature races. We all know that some feature races attract lower quality fields than their grade, they're almost a gimme. Equally there are some that feel very hard to win. As a player, it's like you have to learn which ones are freebies and which ones indicate a proper horse.
10) Better AI targetting. The amount of times I've rocked up to the Oaks only to find myself up against 8f fillies...