The mistakes are fun, and they don't take away from the enjoyment of the show. For me, I think they add something. There is nothing like this out there that people can watch, maybe if you were to watch the rehearsals for a play, although even they wouldn't be quite like what Dark Shadows was they would be the closest, but otherwise nothing is like this.
Writing a show that is on 5 days a week would be hard work. Having to learn new lines everyday, and not being able to have retakes would be very hard also, not to mention stressful. The fact that there aren't more mistakes on the show is amazing.
I love being able to watch what are basically live performances of little plays. Most plays are the same every day. Of course, some days the performance of the same play might be better than the same play on a different day, but when an actor is in a play he or she rehearses the same show/play for quite a while, sometimes months, before the show is presented, and then they don't have new scenes added each day. They just perform the play they have rehearsed, so if you watch a play there usually aren't many mistakes. If a play were done, like Dark Shadows was, where every day is a new play, and the actors had only a few hours to rehearse, it would probably have just as many mistakes in it as Dark Shadows did on TV.
Misa