The issue with Iran for all airlines now lies in their massive currency depreciation and the inability to remit foreign exchange. This is why all the EU airlines have now announced suspending their IKA bound flights with only LH left.
Notice how in 2012, no Arab airline (FZ/EK/QR/EY/SV) have announced expansion plans for Iran with the exception of WY who launched IKA in Sep 2012. EY too only operates to Iran's IKA airport 3 times per week for a few years now and FZ is offline.
As far as the SE Asian destinations of SIN/HKG/PVG etc go, GF now cannot survive in either one of them considering the level of frequencies offered by the direct competition and the reduced European network.
GF's A321s are brilliant aircraft offering an excellent on board product and superb economics on high density Indian Subcontinent, JED and CAI bound routes. It's unfortunate that out of the original order for 6, only 4 have been taken delivery of due to the on going cost cutting initiatives.
Gulf Air puts latest two A321-200s into storage - ch-aviation.ch