Hux has to rebuild some political clout following Stakiller, and that means spending some time on the First Order core planets playing nice with politicians. He's torn between pissed off that Kylo gets to skip this exercise in frustration and humiliation, and relived that he doesn't have Darth Tantrum along to make things even more difficult. Snoke informs him that instead 'Senator Amidala' would join him presently to assist with his diplomatic mission.

+10 this persona is REALLY GOOD at this kind of stuff. Like, would make Padme and Leia proud
+100 he dresses the part. The mind that decided a wholly unessecary voice-changer mask was required to complete his Darth Vader-inspired ensemble has thrown itself wholeheartedly into this role.
+1000 Matt the Radar Technician cameo.