The KUL-DXB sector will depend on the plane. I would try and get on an Airbus if seat width is important, and on a Boeing if seat pitch is important. The service / meal / entertainment etc is all excellent.

On the DXB-BAH sector, compared to US short haul you will be spoiled. The entertainment is of long haul standards, you get a full meal, and the seats are the same as those used internationally.

Cheers