IPv6 firewall features:
- shortcut to match link local addresses easily
- optionally match items within a 6to4 tunnel so those packets don't bypass firewall rules.
- add address-lists like the ipv4 firewall has.
Other IPv6 features:
- 6to4 relay and Miredo
- Enable IPv6 for every service in RouterOS: hotspot, winbox, Dude, Userman, etc.
- PPPoE able to assign and route dynamic /64 blocks (out of a larger block) to PPPoE users.