I don't think one needs to be a comedy snob to observe that the cast had a *lot* of work to do to cover up the glaring holes in the script. The "straight man" character could have been replaced by a cardboard cutout that would have at least had a more plausible reason for being there, most of the put-downs were older than the senior cast members and the plot was essentially nonexistent. On script alone this would be in the bottom 10% of Sitcom Trials submissions.
Since the cast is good, I'm almost tempted to watch next week to see if it gets better with a location change, but I have a feeling it's going to be "Two old queens trade quips whilst a baffled young man with no reason for being there looks on.... in a shop"