Not sure what is so hard for some to understand.

There is now not a need for as much 737 flying in IAH due to other aircraft flying those routes. Not as much 737 flying based in IAH means less 737 pilots needed in IAH. If a 737 route gets better profit margins being flown by an Airbus, regardless if the 737 carries more pax, the Airbus will fly that route. Marketing/UAL is making those decisions, not ALPA.

And with multiple more hubs to filter passengers thru due to the merger, IAH has lost some need to be the end all, be all connecting hub it once was.

It really is that simple. No conspiracy.

Displacement suck, it just happens to be IAH 737's turn to experience it next. Welcome to the club.

DC