Tomino clearly looks back on Zeta like he made a lot of mistakes with it because he was at his worst when it came to the depression the guy seems to have suffered from quite badly at the time. Ironically, barring some pacing issues due to the episode count being around 50, it is easily the most well written of all of UC Gundam. War in the pocket is apparently at least this good or better, but I've yet to see it. I've burnt out on Gundam as a premise, so I never got around to watching it. I'd imagine with new translation Tomino set out to "fix" the original series. Mid 2000's Tomino isn't the same man as mid 80's Tomino.
For me personally, CCA was a massive let-down after zeta and even double zeta, while a light hearted show, the last ten episodes matched Zeta quite well in tone.
CCA is very well animated, the general plot of the asteroid isn't bad and the mech designs are sublime, the character designer was different, but I find that CCA is just not as well written as Zeta, OG gundam or even ZZ episodes 40 onwards. Especially when it comes to character arcs, Tomino just can't write consistent fleshed out characters within a script for a feature length film. They're all quite one note compared to literally any full series he did.