You're arguing from the point that "0079 was the first, therefore it has to be better and its flaws don't matter".
Nope, I'm saying its flaws are more justified, and are more even. They fit within the context the work was created in; a far more limited budget that got canned in the end, not nearly the same talent in mechanical design, music or art direction on board.
Mechanical design as a profession didn't even exist
until MSG coalesced the demand for art designers who could produce it.
MSG is a far more raw experience where you're getting to see where Tomino's headspace was at, picking out elements before they became genre staples, and viewing others that clearly didn't survive into future adaptations. The psychedelicism of MSG never appears anywhere else; it's vastly toned down even in other U.C. installments.
GS is far more polished, it was acting on tropes lost-since established and was simply shuffling them around. It had the resources, the talent, the backing to be 10x what MSG was, yet it wasted that potential, and. it. shows.
It wasted talent, it wasted passion, it threw good art and good music after bad characters and bad stories.
And oh yes, it had worse character arcs. Absolutely. Rau Le Creuset is a Char clone who doesn't get even half Char's development. He's one note, and stays that way.
Amuro never acts as if he's on a "great mission", he instead consistently acts like a 15-year old boy forced into that position. Nor is he ever
characterized as "the savior" of humanity in the One-Year war, he's just one grunt in that war. >> Kira Jesus Yamato, no question.