Hi Jim,
Happy to be of help. OJS 2.3.4 is basically a stability/bugfix update of OJS 2.3.3, and so doesn't include any new functionality -- just fixes. (You may want to see the
OJS Recommended Patches page; the 2.3.3.-3 subpage lists all bug fixes that OJS 2.3.4 includes.)
This page includes a partial listing of changes between OJS 2.2.x and 2.3 -- it's the highlights, basically. You should be able to combine that and the OJS 2.3.3 "
What's New" page to get a good idea on the new functionality that editors will see once you've upgraded.
From 2.3.3 on, we'll be releasing a new userguide every time we release a major (feature-changing) release of the software; and we'll package a "what's new" page along with the guide, so that all necessary information is available in one place.
If you have any further questions about the changes you see, let us know!
Cheers,
James