Phenotypes mean fuck all
What does the YDNA show?
Also good luck with trying to get Armenia in the same union with Azerbaijan and Georgia to a certain extent. You're going to need it
Can't see many of the people you mentioned being very happy with your plans
Pan-Iranists will say stuff like "Oh that is because these areas (including Afghanistan) left their real mother land Iran because of traitors within them, and as a result started fighting with each other and did not culturally progress like us Iranians have etc etc"
Though to be fair western Afghanistan (Khoarasan), Tajikistan, Turkmenistan, Georgia, Azerbaijan, Balochistan, and Armenia were essentially taken away by the Russians and the British after a century or so of Iranian control when the incompetent and hilariously mediocre Qajar dynasty was in charge. Before that these areas of the Caspian Sea region were a buffer between the Ottomans and Safavids, while the Pashtuns and Balochis always resented being under Iranian control (incl. out of religious reasons because most Baloch and Pashtun are Sunnis, while most of Iran is Shia).
If anything these Caspian Sea and Central Asian countries are a prize for both Pan-Turkists and Pan-Iranists, and almost neither of these factions make up a sizeable movement there.
But that being said, past precedents and incompetence does not justify these areas needing to be given back to Iranian hands. All of these areas are now part of independent sovereign states which dont necessarily have a kind word to say to the Pan-Iranists (esp. the Pahlavi and Islamic Republic generations).