I'm someone who's played WoW, FFXIV, and PSO for a very long time, and the best content I ever experienced in the former two games were Raids. PSO2 never really had content comparable to traditional raids in other games. Some UQ's sorta came close, but never with the same amount of stakes or feeling of reward. With no limits on deaths (except for very few instances), no real way to fail a lot of the UQ's, and no large challenging group based content you really had to buckle down and spend a couple hours on, most of the rewards I ever got in PSO rarely felt "earned" to me.
In New Genesis, I'd like to see this change. I know this is very unlikely, but with the right kind of boss and in between trash mechanics I think it could really work out well. The way bosses work now, you dont really need a traditional "Tank" role. Upping the ante to a point where revives are limited and everyone just needs to focus on their own positioning, health, damage, etc. or else face more serious consequences I feel like could work pretty well. Especially in an environment where people had more time to commit and had to really work together to best a boss. I'm essentially talking about a system that directly competes with UQ's, which is why I dont really see this happening, but I cant help but absolutely yearn for a more traditional style raid in PSO.
A traditional style raid would also help keep engagement between content drops. Give people something to keep coming back to that isn't just dailies or a 15 minute UQ. Something you could dedicate long stretches of time to and give you something to really work toward and look forward to. I know New Genesis just launched and to expect tons of content is (eh partially) unrealistic, but I'm really thinking more towards the future. A lack of any real lasting raid content is why I kept falling off JP PSO2.
TLDR; I want raid like content with lots of players and multiple bosses that have a fail condition that you cant just revive spam through and require coordination and a lengthier amount of time then 15 minutes tops to complete.