Speedbird744, don't fool the newjoiners with housing allowance. Most likely they will not get it within the first 3-4 years. People who joined in late 2022 are still on the long list for a move out without any sign of improvement.
Best paid job in the Middle East? Did you count a profit-share / annual bonus? Apparently not.
Regarding the fleet, not even HR or Fleet Offices know. It's based on the current need at the time of joining. It can be anything. For First Officers there is a much bigger chance to get a widebody airplane than for Direct Entry Captains, as QR is mostly recruiting DEC on 737s. Btw, all of the captains who were forced to be moved from 787/777 on to 737 last year are moving back to their original fleet during this year, that is why QR is looking for 737 DECs again.
Regarding the upgrade time it is still 8y+ on any fleet. Regardless of your previous experience. If you are aiming for a captain seat soon then QR is not the place for you. Everything depends on how far from upgrade you are in your home airline.
If you still insist on coming to the Middle East as a First Officer, go for a few days and compare Dubai, Doha or Abu Dhabi by yourself. There is nothing better than a personal experience. From my personal point of view Dubai and UAE itself is more enjoyable place where to wait for your upgrade.