I would like to see DHCP client options available in RouterOs 6.
It has been requested in several topics so we can start using mikrotik routers in more ISP that require some of those options in their clients.
See post.
http://forum.mikrotik.com/t/configure-rb750-for-iptv/54861/2
http://forum.mikrotik.com/t/configure-rb750-for-iptv/54861/7
http://forum.mikrotik.com/t/dhcp-client-option-60/42472/1
Best regards.