There are many problems which can be solved by moving tickets on-chain such as forgery and scalping of tickets. Since all the data is on-chain it's easier to keep track of tickets. Being an NFT, each ticket is mapped to one wallet and can't be forged. There are mechanisms in place to verify that NFT.
We ran into issues building a backstage for organizers since there was a lot of data to be parsed in a more user friendly way. We talked to organizers and iterated on it and got a more polished version working.