I only want super reliability in my engines.  Sure fast accel is great to have, but not at the cost of reliability.  I dont mind tweaking my ECU if that option is available so I have a super reliable, and a fast throttling engine in our dry hot indian weather.  Does a technology exist that will ensure the minimum guaranteed thrust no matter what altitude and temperature the engine is being operated at?    Now this would be cool.  All my engines produce less in the temps I operate in.