I see no problem with a bigger slimeball market.
1. People need slimeballs for sticky pistons and slime blocks. Most people don't need a gigantic supply, but some supply is better than no supply.
2. Spawns are low, preventing large inflation. Either way, slime is ridiculously overpriced because of its rarity.
3. People will not make slime farms if it doesn't benefit them. If lots of people make slime farms, then slimeballs will be worth less. The decrease in worth makes creating new farms for slimeballs useless. People will not waste their time making useless farms, they will only do so as long as there's a high enough demand for the product.
4. Most people will not produce their own slime as not all chunks are slime chunks. It should be noted that not all towns would even allow the creation of slime farms and not all people choose to create farms for everything.
5. People will not need a ridiculous amount of slime, but it doesn't mean people don't need any. I personally think it would be nice to be able to make sticky pistons, which is impossible without slimeballs.
