What I would love to see is a page where I could see my send out breeding requests. I just noticed that if I send out a request to someone's stud, I can keep sending the request. So it would be nice if the name of my lion (which I already send a request for) would disappear from that selection list. And it would be awesome if there was a page where I could see my current requests, that way I could easily remove the request if it takes too long and find another stud.
EDIT: which also would give you your money back if for example that person suddenly doesn't ever come online again on the game. For now your money would just be gone, which would be a shame ofcourse :)

That brings me to my second point. A page where I could search for studs with their prices, energy, basename, genetics name, total markings and online/offline status.

If I want a hetero eyed stud, it would be cool if I could just go to a search page and select: hetero eyes. And then a list with hetero eyed studs will show up. Acutally just like you would do in the trading center, but then to find studs instead of finding lionesses/lions to buy.