772:
N774UA ferried to SFO UA2172 8-Jan
N772UA enroute to SFO UA2174 9-Jan
Did a quick check of non-ER 772 routes, looks like all flights on or after April-4 are showing HD seat map as default.
738:
N12216 was in MCO since 22-Nov, will exit 9-Jan.
739:
N75433 entered MCO UA2199 8-Jan, after a MX cancellation in PHL.
752:
N598UA scheduled to enter MIA UA2131 9-Jan