If only the android devs would implement dhcpv6 ffs.
It's handy in many situation where you want to assign specific devices specific addresses, or at least make a log of dynamically chosen addresses (e.g., networks with auditing requirements).
In 99.99% of the cases you have to intercept or reconfigure.
Also, does Android even use NTP servers that are advertised over IPv4 DHCP? I don't think so, and if not, then is this really a reason?