The butthurt Gundam fans that can't look past this show's appearance are really missing out on some great stuff.
What are they complaining about? My brother saw an ep and said how it lost the space opera feel of Gundam, but we both theorize that the stakes are gonna get really big soon.
Anyway, I loved this episode mostly because Gundam X is one of the two Gundams units I believe were not given justice in their own series (the other being Turn A), and it's nice seeing the Satellite Cannon Again. Mao built the Gundam X for his submission to his master, then uses a custom one. I wonder if Sunrise is actively trying to promote Gundam X (including an explanation for the Satellite Cannon) despite being a not-so-successful show.
The post-credits ending were kind of a bummer (I wanted to see them fight finally), but it does open up more possibilities for the story.