Hotspot should allow public transport to all these WHS in less than 4 hours one-way. There is no public transport in this region. It is not fitting the criteria of a hotspot but it is for sure a good roadtrip.

Targu Jiu will likely be a new hotspot after this convention.

1) Targu Jiu
2) Horezu
3) Petrosani (Banita gorge and fortress)
4) Obarsia-Closani (beech forest)

there are daily buses to all these three regions according to rome2rio.

Cluj Napoca will be a hotspot as well.

1) Rosia Montana (2-3 hour bus ride)
2) Frontiers (Potaissa Turda on the way to Sighisoara 1 hour by bus)
3) Sighisoara (2-3 hours by bus)
4) Village of Saschiz-Keisd (20-30 min from Sighisoara

It doesn't make sense for the other connection pages, but for the WHS Hotspots Connection page, would it be feasible to include a map so that travelers can get ideas about what hotspots may be near where they are traveling? This would be particularly helpful for some of the hotspot cities/regions that may not be as familiar to all travelers.