Does the Georgian army have a centralized command structure like Rhomaion or are auxiliaries still widely used? The army could be a potent unifying factor too. Conversely, how widespread is the Hellenization of Rhomaion's allies like Wallachia and Russia? I'm sure a large portion of the upper class were educated in Rhoman universities and thus Greek will be the French/prestige language ITTL.As long as the required taxes and conscripts are delivered, they’re left alone
Probably helps that Rhomania in the East has a near monopoly (or at least a huge portion of the market) on spices with their influence in the Moluccas. Maybe the Rhomans could create a new market for kaffos. Maybe the first multinational kaffos chains will spread to large Asian cities for the intellectuals to hang out in the early 17th century.A bullion imbalance is a major concern of Rhomania vis-à-vis eastern trade. The main workaround is to tap into preexisting internal eastern trade and use that. Pepper from Java can be sold to China in exchange for porcelain and silk. Indian cottons can be sold in Indonesia and Indians also purchase spices too.