Just did a few laps the moment i saw this get updated: I'm glad you've taken on a lot of feedback! The PRM especially has made a big difference. There's a few nitpicks that may push you to do ANOTHER major update, but these are some things I'd recommend to turn this into an even better track:
-Textures! The new ones are certainly a step up though. I feel the bottom floor's textures are a bit too 'asphalt-y' when compared to the footage that I've seen: if you've been IRL then you know best but from the footage available, that's what I'm seeing. Also from my eye there seems to be two different colours of bottom-floor road: a brown and a gray (see 0:30-0:32 of Teamsport's flying lap of the track, right at the apex of the hairpin): although this is really just a nitpick. A slightly more pressing texture would be that the top-floor textures still aren't fantastic, they're still too wood-y and not quite like the footage.
-More pit boxes! 5 pits is great for some tight one-on-one battles with AI and a small group of friends: but if 10 (or even 15!) is possible, that'd be incredible.
-EVEN MORE smoothing from the ramps. I love the smoothing that you've done to the ramps now, although the upwards ramp could use a bit more polish, especially in the mid-section and the plateau of the ramp. ATM it's not an issue, and i do quite enjoy it. It's a huge improvement over the previous version!
There also seems to be a visual bug where the kart seems to be floating on top of the top-floor's road when viewing in replays. The road is still there, but the kart looks like it's hovering on it. Not too sure if you can fix that though.
Other than that, yet another incredible track. You've turned it into A+ territory, just needs that final push for an S-tier track ;)
Your welcome to drop me a message on the live I'd love to watch! :)