Actually I was also considering to move back. The browser seemed to be slower than before, or is this just a gut feeling?

"Modest" mail was a step back. I finally trashed it and use claws-mail which works fine.

The gmail notifier still does not work here. No idea what it is, I reinstalled it, removed all settings, it still does not auto-update, only when I click it.

The RSS reader has a new bug introduced: When I use the PgUp/PgDown buttons ( to which my d-pad is mapped), it does not scroll but opens the search function. Arghhhhh!

These are the major issues I found. The apps I normally use are all there and I believe if you go back to Chinook you will get more and more problems with newer versions of apps. Better to be with the crowds.