Presumably the portal in Shattrath will remain, which requires some level of KoT rep, I forget what exactly.
- No teleport to either Ironforge or Thunder Bluff in the room
I don’t think there ever has been in the capitals, the portals to all your faction’s cities reside in the current content hub, i.e. Boralus and Dazar’alor.
- There’s no way to get to Karazhan/Blasted Lands/Hellfire Peninsula
There is an NPC to take you to the Blasted Lands, and it’s just a hop through the portal to Hellfire. The Kara portal was just to facilitate Legion Class quests, since that is no longer current, it’s not really needed.
- The teleports to Pandaria are in a much worse location (Shrine>Forest)
The portal in SW/Org-to-MoP already took you to the Jade Forest. This is just lining up with that.
- Other portal hubs have basically become obsolete due to lacking any portals
Good. Pay your local mage for a portal.