Add/Remove/Disable/Enable interfaces to SLAAC client just like DHCP client.
Interfaces could have checkboxes for "use default GW" and "use learned DNS"
Enabling SLAAC client on an interface should add a dynamic entry in RA to disable any SLAAC interfaces.
(or maybe make this optional also)
"Add Default Route" in DHCPv6 client is a decent current workaround, but if an ISP uses a dedicated DHCP server on the segment, and expects the clients to learn gateway from RA, then this would break Mikrotik's implementation.
Stateless DHCPD to send information such as DNS, domain suffix, etc. Some OS don't support learning these over SLAAC.
IPv6 address from pool - ability to specify WHICH /64 from the pool belongs to which interface.
If ISP delegates a /60, e.g. 2001:db85670::/60, then I would like to specify that 5671:: is interface ether1, and 5672 is ether2.
Ability to specify link-local address without having to change the MAC address of an interface.
I would like to be able to just make the LAN interface be FE80::1 by convention so that it is easy to distinguish the router in packet captures, consistent to set default GW on lan clients, etc.