It's always been an awful track to begin with, in my opinion. I've always been baffled by how lame the music in Doom II was compared to the first game.
Well, I can tell you the megasphere in Hectic is gone. I finished the map and went to the next with literally a single health point and zero armor thanks to that; lol.
I'm a lot more impressed with the Chaingunner model. The ones I've seen are just Zombiemen carrying chainguns, and frankly, they look pretty dismal, especially when entering their attack state.
Lol, I'd forgotten how lame the ZDoom notification sound for secret areas is until I found the one secret in the first map. Feels kind of weird having secret areas in Hexen, but it's a very welcome addition.
I could swear the Chaingun sound problem wasn't there before, I think it appeared in the last couple of versions of GZDoom; it's happening on regular Doom as well.