I wasn't aware I had visited this tentative site until the other review showed the picture of the temple and mentioned the exhibition hall. I would think the North Koreans want to inscribe the area due to the exhibition hall but then I read it is mainly about the mountains and the temples in the area. The reason I say this is because every tour will visit this hall and it is a huge propaganda piece. It is common for countries to do diplomatic gift exchanges, your own country will have a bulk load of gifts stored somewhere, but the DPRK makes a museum out of it and claim that they got these gifts because "they love us so much" and "they want to be our friends" (real quotes from the guides). You go figure.
Anyhow, we the group visited Pohyon Temple. It's not bad in any way, but it's like many generic temples I have seen in China and even South Korea. One shouldn't be surprised here but then why try to inscribe them? Apparently (sic) "Buddibism" properties, as the documentation calls it, are well presented in the area, and I'm interested in the "Archives of the 80,000 Wooden Blocks of the Complete Collection of Buddhist Sutras" that I never got to see. A proper hike into the mountains would help me establish and change my mind about this property being worthy of an inscription.