I'm also enjoying it, and had a good experience like you in Hall of Thanes. There are a lot of little quality of life improvements, like the water camera collision is much improved. And having 5ms latency instead of the normal 300ms I had in 2004 is also a big plus!
The closest experience for me is TurtleWoW actually. The vibe and Classic+ extras are very similar, which is good.
I started on RP, then my brother convinced me to switch to Normal, now my best friend is on PVP Horde and I can't even make a character there because of faction balance. So now I have about a dozen characters and making names takes me so long!