With the FIB fixes (still testing - but looking god) the next big feature required is proper BGP Multipath.
With multiple routes of equal weight in IGP ECMP works perfectly - but if we have two equal routes in iBGP & eBGP only one path is used.
See - https://learningnetwork.cisco.com/docs/DOC-11233 for a more decent description
A know it's not going to be implemented soon but its a damn nice feature on the Cisco's that we could really use on Mikrotik!