Happy new year!.
We are at 2015 and a lot of improvements on ROS has happened.
We should keep using MPLS or EoIP and the new Cloud Cores and EoIp improvements are good enuf to replace MPLS?.
Bassing this question on this MUM presentation from 2009 http://mum.mikrotik.com/presentations/CZ09/MPLS.pdf .
Thanks!.
PD. I have some EoIp tunnels passing BGP and OSPF without problems and reaching Gigabit speeds in our lab test using CCR.