Because the group that ran United after the merger was to scared to do what should have been done.

IAH should have never been a 787 base, the plane was always going to be used off the coasts.

LAX 777 flying has all gone to the 787.

GUM has lost most of its tag flying, United has pulled back on intra asia flights. The loss of NRT - ICN over staffed the base.

The 747 is being parked and the flying is being taken over by the 77W.

Other than the Asia tag flying no routes are being lost and all aircraft are just being replaced with other aircraft. Its nothing to be worried about it just should have happened along time ago. Having the airline properly staffed in all seats and bases, as well as having the wide bodies on the routes they want them on will give all of us more stability.