Hello Eli, 

here the last patch that provide Emacs-29 previous behavior as asked on emacs-dev,
I made it the default for now.
The only customization one have to do to make a change is through
register-use-preview which have now three options:

- basic (default - same as Emacs-29- )
- nil (simple preview with filtering, default and no confirm)
- never (same as nil but without any preview)
- t  (the improved version with navigation etc...)

I don't know if you want to restore previous behavior (emacs-29), if so this patch
will apply against the previous one.
(0001-Don-t-confirm-with-RET-even-when-overwriting-in-regi.patch).

Thanks.

-- 
Thierry