If you are seeing constant route changes, I would invest in more repeaters in route.
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So, does that mean it won't find a newer, better route if the old was was working, even if not working the best?
If it's that big an issue just air gap the device you don't want it going to for a few minutes. Most cases you'll save maybe 15ms. If it's worth it to you, can't hurt to try. But it'll probably change it again at some point in the future. But if you're having noticeable performance hits because your mesh is so busy it's probably better to just buy another hub and split the devices.
If it never settles down then it has no solid path
So, does that mean we could force routes by shutting off all Z-Wave devices except the one under consideration plus Z-Wave Plus repeaters/extenders, doing a single-device repair for that device, then unplugging it and moving to the next, etc., then powering up all devices when done?
I did an experiment recently and built out a new mesh designed around ring gen2 repeaters. I carefully placed them throughout the house, including the room that has the hub, and installed then from the hub outwards. Let the network settle for 2 days with just the repeaters. Then started installing devices. The network is preferring those routes at least for now. This was based on line of sight hops (yes walls attenuate RF signal). So my point was to create a solid 700 series backbone.
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Out of curiosity, why does waiting a couple days help this process?
Is there some average over time being maintained to find the best routes?
Unfortunately the 700 series repeaters aren't yet available here in Australia.
That said, aside from some of the routes being what I would describe as odd and there are a handful of devices running at 9.6kpbs, everything in my ~30 device mesh is working well on .145.
Let the network settle.. Plus I got busy 
it did finally switch to the 77 4c route which is a little better .. after repairs.. still strange but at least they are both repeaters..
what is still strange is its going to 77 first (nice it is an aeon ve r7 repeater literally 8 feet from the hub, but then what is strange is its going to the mbr repeater two rooms over from the hub a aeon ver 6 repeater.. then back to the hub.. go figure..
0x48 (072) OK in: 0x5E, 0x26, 0x33, 0x70, 0x85, 0x59, 0x72, 0x86, 0x7A, 0x73, 0x5A, out: Basement Freezer Repeater None 01 -> 77 -> 4C -> 48 40kbps
0x77 (119) OK in: 0x5E, 0x55, 0x9F, 0x6C, out: LR Extender S2 Authenticated 01 -> 77 100kbps
0x4C (076) OK in: 0x5E, 0x26, 0x33, 0x70, 0x85, 0x59, 0x72, 0x86, 0x7A, 0x73, 0x5A, out: Master Bedroom Repeater None 01 -> 4C 100kbps
actually im reading it backwards so it makes total sense becuase the mbr repeater is right about the basement one. so it goes to that firs tthen the lr one then the hub..
cool 
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How should the speed that shows in the Zwave details tab work into a consideration on the health of the network?
And all of us with C-7 hubs thank you for that.
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Are these the "700 series" range extenders I see mentioned repeatedly? Alarm Range Extender | Ring
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The ring gen 2 is 700, the gen 1 is 500.. Plus it has battery backup, so your routes won’t get all messed up when you have a power outage.
So the one I linked is the one I am looking for then? That is all I was wanting to make sure of. I was not seeing the "700" in any of the specs on any of them that I was looking at. Just thought I would ask before I clicked pay in the checkout cart.
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Yea... Not sure why they didn’t advertise that it’s 700 series.. But they really never intended their devices to be used on other hubs.
Now fair warning.. They don’t like C5 (they stop reporting when not included with S2)
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Isn't all the Ring Gen2 gear 700 series? I'm thinking it could be a nice budget friendly option for contact sensors.
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Yes.. It is.. And we have built-in drivers for all of them.. They are good devices.
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