Etihad Guest has been a surprisingly generous program, more so than their competitors in the Middle East region in my opinion.
They’re a Citibank ThankYou rewards transfer partner, and their award availability is good (I’ve always booked my Etihad awards through American AAdvantage, however).
Effective July 8, Etihad is making some major changes to its frequent flyer program — along the lines of rewarding premium fares more than cheap ones (although rewarding everyone less overall) and becoming less generous especially for premium cabin upgrades and redemptions.