Finningley Boy,
UAV's can be good, very good, or, if designed by BAE, hopeless.
Manned aircraft have advantages over UAV's in some areas, UAV's have advantages over manned aircraft in other areas.
Manned aircraft and UAVs should be used in a complimentary manner. I would not wish to depend upon either alone.
The improvement rate with UAV design and technology is currently much greater than with manned aircraft. This is to be expected with a relatively youthful technology.
My belief is that even in the future, when UAV technology does catch up with manned aviation, there will still be situations where a manned aircraft will be better than a UAV. I also believe that there will also be more situations where UAV's should be used over manned aircraft.