Too few flight attendants
I noticed on a recent united nyc-lax flight there was at least one fewer flight attendant than normal, and two fewer on the way back (this was on united, coach) which meant an inconvenience mostly insofar as there was less beverage service. Still, annoying. Also, United's red carpet lounge at JFK had not a single person working there and the food was ghastly (still-frozen bagels and vacuum-sealed danishes). Food was no better at LAX and the drinks cost! -- what's up with that?