That’s the difference between Warner Archive and Warner Home Video. WAC’s releases of Jonny Quest and the Jetsons are limited to 8 episodes per disc, WHV’s release of The Flintstones will be at least 16 episodes per disc.
Yes, but should they? This general cel sloppiness is inherent in the filmed process that has always been there since day one but just wasn't as noticeable over broadcast television.
Actually the DVDs showed way more detail than the original broadcasts. What really stands out is cell dust, fingerprints, smudges and so forth. Hanna-Barbera was on such a limited budget that the cel-work was really sloppy, compared to Disney. I can only imagine how much more the imperfections...