Jus a very quick first impression while giving it a listen in an existing session:

I’m quite impressed… I think it sounds great. All the rooms sound more natural and they all seem useful now, which wasn’t the case for me before.

That’s with no direct v4 vs v3 comparisons… just firing it up and going for a spin. Haven’t tested system-wide yet. Back to work…

Big thumbs up as a first impression.