First and beforhand I want to say that the following critique is not meant to be bashing you guys or anything, but if constructive critizism is asked for I will give it.
I walked out halfway, it wasnt really hitting my humor. Except the Big Father-ish guy who had a very satirical way and knew how to work the 4th Wall ^^
Basically what bugged me was that the pacing and flow of it was very very slow - long idle pauses or repeats of previous statements made it feel pretty draggy altogether.
Though when a new Input was given (phoned-in "Commands", arrival of the pastor) it started getting more dynamic for a while and was kind of entertaining until the Conversation-Line "Ended" and noone really started throwing new hooks at each other to start it anew.
Also I aggree with the actors stating that the commands were to rare and to losely placed - again maybe the pacing could have been helped a little by giving more guidance through that.
The Audio itself was kind of weird at some point, getting louder and quiet constantly, but that was not only a problem at FILTH but in general (sry Tech Guys :3 I know its a hard job ^^)
The acting itself was solid, you could sometimes see the actors getting nervous but you never really heard it and it never really steped into the foreground, which is impressive considering the crowd :3
Definitly kudos to you for stepping up on that Stage and throwing an Improv show, again even though my feedback is a little negative I hope you dont get discouraged, and maybe the honest opinion helps you in the long run ^^
greets