The show has some flaws, but overall, I think it has fully realized one of Gundam's main goals from the very beginning. The way the two most recent episodes handled the entire Tekkadan crew's reaction to various events - such as Mika's mauling of Carta, or the seemingly hopeless engagement with Gjallarhorn on Earth - was perfectly juxtaposed with Merribitt's horror, with Orga's internal struggles at making the decision to send children to die, with Kudelia's finally coming to terms with that reality (even wearing a Tekkadan jacket!!).
And what I think is so strong about this message is that, compared to - say - White Base's journey in 0079... Tekkadan has barely accomplished shit. Their whole job was to get her to Earth, and it took the entire season to do so, and half or more of them are now dead.
This show gets flack for its pacing, but I like that. It's REAL. It's powerful. There's comparatively little honor or sacrifice in a death like Biscuit's when compared to Ryu, for example. He died with a likely pessimistic view of whether their nominal mission would even be completed.
I really like the whole "go home to where?" thing, too. It's a grim reality of so many soldiers' lives all over the world, young or not. Also, I think it's a big departure from some of Gundam's protagonists and the way they use their families and past lives to tug at heart strings - from the snotty privileged Amuro and Kamilles to the sort of 'revenge' narrative of guys like Setsuna... Tekkadan just comes from dirt. Pure, red dirt.
I see a lot of people talk about how one dimensional Mika is, but I find it utterly fascinating. The way he approached Orga after Biscuit's death was so intense and weird. He's just so goddamn weird. I love it.