I always thought Mospeada or RT New Generation your choice, was a great series. Lots of action, surprises, some silliness. Agreed the episode with the river rafts for transporting aircraft was bit far fetched, as a Legioss & Tread must be heavier than $h*t fully loaded. Its a Shame there was never a true sequel by now.
As for the shows premise and concept, Older Anime series out of the late 70's & 80's used a lot of WWII exploits and concepts in their story lines. I always thought of the series with Stick and his crew as something like the French & Dutch underground's in Nazi controlled Europe. Read some books, you'd be amazed the stuff the Underground rebels pulled off, weapons, tanks & aircraft, blowing up railways and assisting the Allied troops during the invasions. And using what ever they found along the way. Playing double spies, secret maps and infiltration missions too.
Not much different than the gang finding more Legioss fighters and a Tread, keeping a low profile, striking when needed, infiltrating the old base in the mountains, getting more weapons from the crazy old guys in the desert, and then assisting the Main fleet when they arrived to destroy Reflex Point.
Sorry all, I have some free time today and felt like rambling a bit, plus I have a cold so I think the medicine is talking as well!!