Why does XCVR2450 have two rf frontends?

XCVR2450 can have two antennas on it.
But it doesn’t support a full-duplex mode because of having a common LO.
It neither supports a MIMO with these two antennas. (it does support
MIMO by using a mimo cable between two USRP2s but not without a mimo

So… why does xcvr2450 have two rf frontends? Do I miss something?