I will disagree with you here because the slapstick in SM006 was horrible in my opinion. While the Lana episode was somewhat fillerish and still pretty good, that episode still had backstory about Lana. The only pure filler of SM was really disappointing to me.
SM6 had its moments, so if they don't overdo it in this episode, it might not be all that bad. Look at last episode, it had some pretty fun things going on. Nothing too over the top or forced, so if they keep it at that level and make the filler not completely pointless there's hope.