So far the Copied Factory has taught me that my UI isn't optimal.
Things I need to change:
Turn off or limit spell effects for non-party members. My main has settings right but it's literally impossible to see some effects on my alt through all the raid's spells.
Move target's cast bar. Need to figure out how to do this because reading the incoming abilities is so important here.
My least favorite mechanic is the slams on the second to last boss. I can't read them, I have to just follow the raid and I don't know if it's just because they've memorized the pattern or if there's a tell that lets you know which move is next. If it's a static pattern and just memory, then there should be a telegraph on the ground indicating it. If there's a tell I think it should be more pronounced.
Overall, I like the bullet hell mechanics (but I play Aiming), and I like that the raid doesn't have too much trash.