We went onto PTR to just test sunwell and it's scripting there were a few small things and a few big things
First: Kalecgos can be kited anywhere in the dungeon, it never resets. On retail once you reach the platform it resets the boss, also sometimes the door does not spawn to prevent players from running out of the boss encounter
Second: Kalecgos, If you wipe on the first boss any attempt after that without resetting the raid causes 2 demons to spawn inside of the portal instead of one.
Third: Kalecgos, If you die within the portal it does not spawn your body outside of the portal after the encounter so no chance for rez, you must run back
Fourth: Brutalus, The hit box for brutalus is WAY to small compared to retail. (Still killable) Forces you to stack more ranged with very few mele
Fifth: Felmyst: The boss isn't scripted at all, you pull here and she just stands there and lets you smack her
We tried the twins, after 1 attempt we stopped. But it seemed perfectly scripted. Everything in sunwell is buffed HP and Damage which is actually a very good addition causing encounters to have some sort of thought put into them. Overall the raid is decently scripted (Besides felmyst)