Agree that loads are fairly good. ZRH is currently operated twice daily, the morning/noon service 5xA321 and 2xA333, the evening service 7xA321/737. Today TK1908 was operated with an A333. J was exactly 50% full and Y about two thirds. They also loaded a significant amout of cargo into the belly ...
Obviously, a key factor are traffic restrictions. Currently both Turkey and Siwtzerland require a negative PCR result, but no quarantine.