I don't know about 'overcrewing' on the wideboby fleets...
I'm on T7 and have been borderline to 900 hrs (870 to 890) for the last 365 days 6 months running.
How are those captains flying 500 hrs? Menagement? TRI/TRE?
And the first batch going to 787 is from our fleet. And 8 more T777s are still to come to QR.
Check your info and do the math more carefully, please.
Cheers!