MAN 777
I think one of the concern to the MD3 may well be the geopolitics, and concerns over the routing from the Gulf to northern Europe ie over Iran. Oil price rises will if anything strengthen the Gulf economies, but if they do not rise too much it will not have a retrograde effect on western economies.
With regards the Chinese Economy it is slumping currently but they do have many investments outside of Mainland China which still require visits as well as a large student population, so I do not know if this will off set the concern you listed. I would say that I question if there is enough demand to support the additional Chinese flight over and above the existing CX flight but we will have to see.
Regards
Mr Mac