I was in the thick of this when the Demarini CF Zen youth bats were known to be the hottest bats around. They were selling on eBay for hundreds above retail. Just like the Meta Prime BBCOR from last year. When they started to ban the Zen it was a few specific lengths first then the entire model year. Once the sanctioning body is onto the design they will keep testing in all lengths and likely find enough that are out of spec to ban the whole model year in every length.
For the Zen, they did not go back and ban the CF8 which was the same bat from the previous model year. I would not be surprised to see the entire Meta model year decertified and the Meta Prime selling on eBay for North of $1,000 pretty soon.