I agree, the latest update is a disaster. I'm stunned that they have deemed that ready, in the same way that Apple last year released OS X Yosemite with a very buggy network stack. It's like they didn't test it at all.
I will say though that the configuration change they mention has made it stop crashing for me:
1) Go to Lightroom > Preferences.
2) Click on the General tab
3) Uncheck “Show ‘Add Photos’ Screen”
4) Restart Lightroom
I have always limited my use of the import dialog to the minimum as it's unable to rename my files in a logical way. I copy my photos to a relevant folder on my laptop using the Finder and then use a rename tool (Better Rename) before I add them to LR.
The design changes are quite strange, it's been given a new look that's different from the rest of LR so now there's 3 different looks:
1) The main interface with the various modules (Library, Develop, etc.).
2) The Preferences panels and the Export panel.
3) The Import panel.
What a mess.
The Adobe CC application is also silly. It's basically become a commercial for "Adobe Stock". The primary feature of keeping check on updates to your programs, still isn't working. It seems the only way to get it to check for updates, is to logout and login again. It also ought to include a one click option to revert to the previous release. Shouldn't be too difficult to implement, but since they haven't even managed to implement update checking yet, I think it'll take a while.
/rant
