I'm putting him here because others like him, but I haven't used it in a while. I can obviously see how OP having like +7 culture in your capital from the pantheon would be but I haven't actually encountered it ever. This could be a map script thing.
I do think map script is a big factor. For example, my communitas_79 maps love to make beautiful klondikes, so stars is just a godly pantheon.
Meanwhile I rarely find open sky as powerful as others claim, I think my maps are hillier than some others (I never see the kind of flatland I see in some screen shots for example). Likewise, earth mother I don't generally consider too bad, I often have lots of good mining resources at my fingertips to get the bonus off of.
So probably the best assessment of a bad pantheon is....does this pantheon really have a niche, would I actually want this over another pantheon even in reasonably optimzed conditions?
That's where I come back to Expanse as an example. The only time I want expanse is border blobs with Russia. Otherwise I think there are better pantheons for production that are a lot easier to found with. The reason for my change here is that it would push borders to the front of the pantheon, you would get your first initial coups of border expands significantly quicker, at the price of slower border growth later in the game. I think that solidies the niche of the pantheon back to real border growing rather than just "hammers and faith through a roundabout method"
Craftsman: There is a point to be made that perhaps this is "stonehenge only pantheon". My issue with it otherwise is you have to commit a LOT to getting it going, and if you get there and craftsman has been taken, well you are just screwed. But if you take it off of stonehenge, you have that comfort ahead of time. But then again, if I'm going stonehenge, would I really take craftsman over something else...there are a lot of solid pantheons if you have stonehenge to boost it.