Did this a few weeks ago with Broadway's Next Hit Musical. I'm still getting used to improvising with Matt Giroveanu, Daniel Tepper, and Megan Reilly. I have a feeling they're getting used to me too. Luckily, you can see how fun it is figuring it out (note the end songs when Megan and I are singing together. So funny!)
When I was in Chicago City Limits I was doing 4-5 shows every week. With Broadway's Next, it's more like once a month. So that means I have to deliver when I arrive. I only get the one shot. Luckily, we do have rehearsals a few times a month. I'd say that's the biggest adjustment in performing pre and post kids.
Either way, Happy 2016 to you!