Roon is snappy responsive now

Roon is very flexible in how its sound can be tweaked including applying user defined EQ and/or DSP. DSP is perhaps the feature now that I could least live without. I use the DSP for room correction and canned DSP convolution filters with headphones. These are game changers and big time $$$$$ savers used right or can also easily be a seeming deal breaker if done wrong, which can easily happen given all the options to consider,

I plan to dive right into that as soon as my basic room treatment is sorted. 

Agreed, something has changed for the better.  Previously, I'd be browsing an album and when I returned to my Artists list the top row of Artist icons were blank causing me to restart my Roon Remote every single time.  That's now stopped happening.  It was a minor bug, but it was getting pretty annoying.

My experience is the exact opposite. Each time my phone locks, the roon remote app on my iphone loses connection with roon sever running on a macbook pro. When I reopen the remote app I have to restart it to resume playback control. I'm not sure what's going on but the issue may be isolated to iOS. Roon seems to work fine when I use my second macbook pro as the remote. Minor nuisance and not worth brain damage to open a ticket. 

Just filled out a survey today, they care, we'll see what changes are brought forth:

Yes I filled out the survey and emphasized improving performance and reliability and making ARC better and more reliable.  Sonic analysis like with Plex would be a nice enhancement.