I'd love them to do another a box set.
But 2023 is still a long time to go and in the last 30 years there was a lot of great stuff announced that never happened. So until I really hold that new box set in my hands, I keep listening to Whiskey and Eggs...(oh, wait a minute...;- ) )

Concerning the songs to be picked: I'm happy about everything that has Richie on it. Everything after 2013 does nothing for me. And I don't think we get too many tracks from the 80s and 90s. The 90s were mainly covered with the first box set. I still think they don't have too much from the 80s left because otherwise I can't explain why there were so little songs on the 2004 release.
So my guess is that we get stuff from 2000 onwards (and by saying that probably more from 2005 onwards since that's the period in which demos and outtakes are barely known).