the imbalance of trade between Rome and the Far east will always be there, the only thing that made it go away OTL was Opium........ mind you it would make sense if the merchant class saw the profit they could set up 'opium factories' in India under local ownership then ship it to China in return for the high value goods that originate only there. Not nice but I suspect highly profitable as opposed to the Chinese just wanting Silver/Gold and a small quality of glass. one further additional thought what about exporting perfume in bulk from Rome to China? Of course this would depend on the development of fractional distillation so maybe Brandy as well..... I recall reading somewhere about perfume bottles from the west being exported to China during the Roman period so now that there is regular Rome to China trading fleets so Bulk products become viable unlike the OTL with triple or more middle man arrangements........
I am aware that China pretty much only wanted precious metals in trade for their goods, but do you know why that was?
Seems off that luxuries only Westerners could provide (or had a near monopoly on) like coffee, chocolate, tobacco, sugar, amber and later spices were not in high demand in China. Did their strict isolationism just prevent them becoming popular and needed?