The long awaited RouterOS 3.18 release came out today.
Part of the features, I was looking for was number one on the changelog list "*) IPv6 address auto-configuration: added recursive DNS server option;", but also various fixes in mpls-test and routing-test.
So, we'll start upgrading the lab-routers and DOH !!!! .. Instead of adding rdns advertisements, RA doesn't work at all. No IPv6 autoconfiguration. Let's see how the tests progress, but this is very bad already.