Page Builder 2.2

I’m in the process of updating my sites to 8.9.6 and am going to update my Page Builder from 1.8 to 2.2. I’d like to know:

1. What changes have been made: are there extra features or does it just fix bugs?

2. Will pages I have previously built with page builder be unaffected? I don’t want unexpectedly find elements on my pages have changed.

Has anyone experienced any issues when updating this plugin?