I have used Etihad couple of times with good experiences. Also recently I had my parents fly Etihad and they said they had overall a comfortable journey.

Things that worked for me-
- Cheaper tickets ($250 cheaper than Qatar for my tickets)
- Abu Dhabi immigration is convenient, you can complete all immigration process in the airport itself, free wifi, presence of good number nepali employees can be another convenience for non english speaker travelers.

Sorry no idea about hotel facilities since I did not have long layovers.
Have a nice journey!