Raegen is pretty good at what he does, but he's not a top dps at all. He's good because he chains with a few families at 7* and has support such as raise, resist buffs, stat buffs, breaks, etc. He's not the best at any of those roles, but he can do all of it so he's super slot efficient. If you already have Sephiroth, he's way better at the "support chainer" role to pair with Hyoh.
I used him a lot early on in JP because of that flexibility, but once I pulled some meta units on JP Raegen has never left the bench since. Because of that, I'm skipping him on GL. His TMR is best in slot for dualwielders though, so if you want to chase a unit just for a TMR, there's that.
Star Ocean collab is 99% confirmed because Star Ocean had a convention in Japan or whatever that had posters and stuff promoting the collab, so yeah, we're getting that next week. It's a raid, and the units are beyond trash tier (and they don't have a 7* form) so absolute hard pass on the whole thing unless they do GL buffs (they prob wont).
We should also be getting Itemworld next week, and that's something to be excited about. Get ready to pray to RNG for good enchantment rolls!