It would be nice to view and read about some OpenPublish production sites.
I've built several OpenPublish sites, but eventually had to drop them and go back to conventional Drupal.
The OP is certainly an attractive concept. I have thought that it may be too complex an install to start. Possibly a more incremental approach would be better.
I'd sure like to try it by applying modules and such over time as I get things working.
This isn't that easy, because you don't really know where to start or stop.
Having everything fired up and working all at once, really drains you when you have some issues.
Troubleshooting is a pain, because so many things overlap.
I like to back into things, eliminate features and work backward, or work forward adding things incrementally.
This way I can solve issues as I go in an organized fashion.
I turned off all the Features OP modules and the install wouldn't run. --- Back to square one. LOL
I'm not knocking the OP. I keep coming back doing an install every week or so, hoping to get a grip on it.