Well if enough athletes did it, you would have two different leagues of play. One for the spliced and one for the un-spliced. It would be the only way to do it.... but on the other hand you'd have to deal with one being wildly more popular than the other. Also about the "Price point" The price could come down if 2 types of the serum are in circulation. First is the normal use one, basically one use and your the beast man. But then there would be the military grade one. Minimal controlled effect with maximum controlled power. Basically several splicing things mixed together to have all the best things from different animals. Eyes like a hawk, sharp hearing and sense of smell, sharp reflexes strength, and you know they would try to get those soldiers to fly, and have as many biological weapons as they could afford. I could see "that" getting expensive, but just being spliced with one animal not so much.
Now would I do it or not? probably yes. I would want to go with a form of Turtle, probably an alligator snapping turtle. Shell, a wicked bite, and some enhanced stamina and durability would make me a human freight train. or spliced freight train as it were.
I think the REAL controversy would come with children. A baby is born and the parents want them to be a howler monkey. They have the money and preform the operation. Now that child has no say, they just get spliced for the rest of their life. Kids at school be damned, but the novelty of it would wear off pretty quick for that little kid. That is where the real controversy would be. Is it ethical to force all your children to be spliced? Or to be spliced before a certain age. Then new laws would be enforced, but only in some places, while other places it would be lawful to have all your children spliced. It would be a fairly big issue, for obvious reasons.
Laws age limits and obviously splicing rare animals would be more expensive, but possibly not give that much more benefit. A cheeta is basically just a big cat, not that different than your common house cat. but the house cat would be cheap and easy, while the Cheeta would be expensive and rare. Supply and demand would be a huge factor in how this would play out, but I for one, would be for it.