Dear community,
first at all, the feature is quite nice. It feels more worthy now to farm on different places than just baal/nila/dia before.
Few chosen locations are from my view “to small”. I like to stay ingame and by improving the “ingame-time” we will see more people playing around together. Thats a huge plus. For example in tal rashas there you see again lobbies just because its a big one and people have time. Sanctuary is for me to small to run(not everyone teleports as a bowama 
), tristram not enough units.
By knowing now how it feels, wouldnt it be much better to affect more locations or maybe the whole act? Like there is really a terror on this. Also add some “dark minions” into these places with a bit of doomness from ubers.
By improving hardness with some uber monsters and higher hp/skills we can also have a playerbased terror variable. For each player joining, not only enemys will grow stronger as usual but aswell another location will turn into a terror zone up to 8.