No reversers on landing because the aircraft has carbon brakes?
No flaps on take-off to save engine wear?
Sorry gents, but I would need someone to substantiate those claims.
Reversers would be used on landing unless 1) you're talking corporate jets or 2) you're landing at Edwards or some other 15,000' runway. Think about the Space Shuttles; DC-9 size, no reversers, just an airbrake, takes FOREVER to stop after landing. Anything 777 size would need all the stopping power it could get.
Flaps increase the lift of the wing, making take-off and landing speeds lower. Therefore, the aircraft can get off the ground at a lower speed. Therefore, the drag of the gear on the runway and in the air prior to retraction is reduced faster. Therefore, the engines would work LESS with the flaps out. Also, transport aircraft are certified with flaps, and the FAA sure would be interested in a revenue take-off without flaps, especially since there have been numerous crashes blamed on improper flap position!!!