Let's see:-
Salary has improved, compensation for what exactly?
Benefits: there is no Senior Staff club any more.
Work environment: lots of pollution, there are figures out there to prove it.
Professional development: what, as in promotion? You'll get Qatarised.
Equal opportunity: male/female or expat/Qatari? Work it out for yourself.
There are many better oil companies out here. Choose one which is not state owned.