Blimey! With Gatters going all A388, Emirates continue to rewrite conventional wisdom. Wonder if this might finally nudge Virgin out of DXB and redeploy an A330 onto the ATLANTIC.
MCO btw is volume driven with very small premium cabins on VS and no F on BA, it's a traditional LGW route that is very unlikely to move to LHR unless they build that third runway.
Slots at LHR churn between users with some gravitating towards heavy metal. This drives passenger volumes for roughly the same level of ATMs.