I turned it on for my play through and there's a few spots where it's detrimental to the art of season 1-3
Yup. I would have prefered Season 4 look like the rest rather than having the comic black filter. Good thing it's optional for the earlier episodes.
This is a re-release. The old versions of the game try and talk to telltale servers, which aren't online any more. You'll lose sync and some summary info. I would just get this, it's so cheap anyway.