Running a repair with devices that are at the edge of your mesh and not communicating properly with the controller, can make things worse. I would take advantage of the individual device repair that Hubitat controller offers. If you go to Settings, then Z-Wave details, each repeater will have a repair on its table row. Run individual repairs for the nodes that failed the first time. Then resolve any problems with that device before you move to next.
When comparing your older mesh to the Hubitat mesh, keep in mind that you are comparing an established mesh with one that has not yet been established. Once you bring your Hubitat mesh to a stable level, you would benefit from the same or greater reliability than you had before.
If you didn't read this post already, I recommend checking it out:
