That's funny, because the pacing is another thing that reminds me of TOS and not at all of any of the sequel shows: they cover a lot of big story with big things going on in forty-odd minutes a week. TNG, DS9 and the others worked on a much smaller scale.
I mean, whole wars started and ended in a single episode of TOS. They saved the galaxy from a giant thing that was eating planets in less than an hour.
The only episode of The Orville that's particularly reminiscent of TNG in its approach is, i thing, "Something About A Boy."
In some ways, it's a TOS revival.