I watched both shows out of a morbid curiosity.
I still watch Colbert even though the show is rarely funny and gotten really calcified. It's deteriorated into Colbert slamming Trump in the same ways over and over (which is, admittedly somewhat enjoyable) and saying "Biden is old!" It was a confusing episode, though; the monologue was new (lots about the game), but the Jon Stewart segment seemed like a pre-tape. The Krazinski panel definitely was (they admitted as much), and I couldn't tell whether Gosling was "live" or taped. I can't imagine it was live, but it would have required filling the Ed at, what, 10:00 on a Sunday night or a ten-minute monologue? I mean, Colbert's audience is nothing if not fanatic, but that?
As for "After Midnight," I had slight hopes because of the guests (though I'm not really a fan of Maria Bamford), but Tomlinson is still really unfunny on an SNL-level, mistaking yelling for being humorous. Given the current state of comedy, though (from my limited perspective), that's probably a thing for most audiences.
(Parenthetically, I'm watching Jon Stewart's return to TDS and am just dee-lighted to see his both-sidesing skills are as sharp as ever: "Trump is a direct threat to American democracy, but that Biden sometimes mixes up his words like he's been doing for 40 years.")
--Dave Sikula