Visiting of Cetinje was slightly disappointing during my visit some 10 years ago, and I think it does not deserve the WHS status.
I did a trip from a touristy Herceg Novi through even-more touristy Kotor to Cetinje as a final destination by a local bus. Well, we originally planned to continue from Cetinje to Lovcen Mountain with mausoleum of former king of Monte Negro on the top and obvious superb views to Boka Kotorska and Mediterranean cost of Monte Negro. Due to rainy and stormy weather, we changed our plans and spent in Cetinje longer time than expected, it means a couple of hours. When we left the touristy coast at Kotor and started to ascend to Cetinje by serpentines in the very steep slope, we entered completely different Monte Negro. Further, it was rainy and fogy, thus the views were rather limited.
Finally, we entered an ugly bus station of Cetinje. We refreshed ourselves by traditional coffee prepared in a cezve in very dark and very non-touristy bar at the bus station, and waited until it stopped raining. After that we walked to the center of Cetinje. The compact core consists of low town houses with typically two, sometimes three floors, but they were not very picturesque and built in no particular style. We had a lunch in mediocre pizzeria there. After the lunch we enter residential quarter of Cetinje with the royal palace (PHOTO) and adjacent always crowded monastery church, which was the most interesting structure in the entire Cetinje. The royal palace is quite small and not very spectacular, and I cannot imagine that this would ever become WHS.
Then, we went by bus downhill to Kotor that is much more interesting destination than Cetinje.