I personally don't care for the theme either, but apart from all that, it's Stern consistently releasing a brand new pinball machine. Can't please everyone.
As for Photoshop artwork, a lot can be dictated by the license holder. See - The Hobbit. People weren't too happy about The Hobbit's playfield artwork, but there was talk on Pinside that they had strict licensing conditions that they had to work with. With Metallica, it was a case of the band wanting Dirty Donny artwork which ended up working in Stern's favour as it was a breath of fresh air to the hobbyists that wanted hand drawn artwork.
After the dust has settled, I look forward to seeing this game in action and having my first game on it.
Cheers!
Adam.
