Colin and Kevin's characters are on point with their voice acting, whereas the rest of you still feel as if you're reading off of scripts. That's fine, you guys are personalities, not voice actors, but it's something to point out.
Also, some of the inside jokes feel a bit hamfisted. I'd love to see you tackle them a bit more sparingly, and in the manner you took on Kevins watch - a bit more drawn out with more of a payoff.
Overall, love it. Can't wait to see more! I'm sure they'll get better in time.