They should remove all the portals imo.
No, I rarely ever get asked to give portals as a mage. If this all gets put in, may as well remove the entire portal spell.
Shattrath has portals to Stormwind and Orgrimmar, but not one to the Exodar.
Exodar has portals to Darnassus and Blasted Lands, but not one to Shattrath.
Apparently the draenei don't care to keep in touch with each other.