Routes will eventually fill in as the devices check in with the hub - not unusual after a reboot for them to be blank for a while. Battery devices tend to be blank longer do to the nature of their check in cycle.
A high RTT and/or negative relative signal strength (RSSI) are indicators that a device may be having issues communicating - may not be causing an issue, but may need a repeater or two to help them.
Don't think you need another hub from a number of devices standpoint as there are several people on here with more devices. You mentioned that you took the power reporting down to 5 minutes, has that helped? May want to check to see if any of your devices are ones that are known problems on the C-7 (the ZSE40 Zooz 4-in-1 comes to mind -List of Compatible Devices - Hubitat Documentation).
Hi there, I see that you have sent us an email today (ticket 22394) and the last ticket we had from you was back in January (ticket 20290). Do you happen to have a ticket number for the email you sent us a week ago?
For today's ticket, we will further investigate and get back to you as soon as possible.
Sorry I don't have my ticket number. So I decided to resend my email today and this time I keep my ticket. Probably I did something wrong in my first ticket.
I WAS WRONG !!!! I just check on the devices and they are ZEN25 and NOT ZEN30. I'm at the right firmware, latest Hub update. But I don't know which one is parameter 18. I will exclude my 4 Zooz devices and see if it helps. Thank's for the good advice.
If you don't get an automated email that a ticket number was assigned, chances are that we didn't receive your email. Someone last week, for example, sent emails to my personal address, which has restrictive spam filter and I rarely check the spam folder. Please be sure to send emails to support@hubitat.com.
I took a look at your hub's error log and I don't think you have a Z-wave problem, but rather a database problem. Something appears to be locking your hub. I see errors from several custom integrations. I would screen the logs more closely to identify which integrations may be locking your hub. Also, if you didn't do so already, I suggest performing a "Soft Reset" with restore by following instructions in below document:
Hub is looking good after reset. I see the Z-wave queue was full the other day. If you didn't do so already, please unplug the hub from the wall outlet for a minute before plugging back in. Going forward you may need to adjust frequency of Z-wave polling and/or the number of events the radio receives, to avoid filling up the queue. That may explain the problems you've been having with the Z-wave devices. Unfortunately, moving the mesh to a new hub will not resolve this problem.