Yeah, after messing around with the new 3.5.11 Audirvana, I'm going back to the Audirvana Plus 3.2.16 release.
Most notably, it keeps crashing after every library update, and the interface has way too many bugs. For example, I like having metadata permanently open and the 3.5 release doesn't update what's displaying in the metadata column when you click on a new track. You have to collapse the window then reopen it, just to get the selected track to display. That's on top of the fact that the app doesn't remember my UI settings, so the artist/album and metadata columns shrink to their default width whenever the app restarts, or even after going to the preferences panel and back. I shouldn't have to manually resize them every time I leave the main window. Honestly, this feels like a beta release.
On a more subjective point, I prefer having the artist, album, etc. columns above the track window instead of to the left, and there's no way to change that in the new UI. And that preferences panel? It's an organizational mess compared to the previous app's mini-window. For all these supposed UI improvements, it seems like it's mostly taking big leaps backwards on that front. One would think the bugs I mentioned in the last paragraph would be high priority, but who knows? There have been multiple bug fixes since 3.5.0 was released and none of the ones I mentioned have had an attempt at being addressed.
Documentation is non-existent, so I tried to register for the message boards and I'm still waiting for my activate user email from the admin. Even if there are ways to fix my concerns within the app, it's not making it easy for me to learn how.
I do like the minimized version of the app window, with the large album art. And when offered the option for a darker theme, I usually opt for it. Those are about the only positive things I can say about 3.5.11. Oh, and I guess sound-wise, I didn't notice any hit to performance.