Interested to see if Peplink will comment on this at some point.
Good write up from Meraki on the potential impact (dhcp pool exhaustion, ip conflict etc)
I could see the DHCP pool exhaustion be a common problem with networks with many iOS devices.
Shortening the lease time would be a way to mitigate issues.
According to Apple, they reuse the same random MAC address on a given network but may release an update to rotate the random Mac addresses further exacerbating the potential problems.