I think UFOLOGY is a legitimate scientific study. Having said that, there seems to be no central standard by which cases are evaluated. By that I mean the subject needs resources and equipment (labs, image equipment, codified procedures, and a world database of research)
The evidence needs to be collated into one place, so all researchers can access the same information.
I think an international sky survey needs to be taken, using the above systems. Ive seen some very good Near IR footage of interesting flying objects. I would also study in the UV spectrum.
Spectral analysis can also be taken of the light coming from the object. Known light sources have a "known" finger print. Perhaps a genuine UFO is using non terrestrial light generation methods.
Also frequencys of sound lower and higher than human range, should be collected.
Thermal fingerprints of the object could also be taken.
But, all this is quite expensive. It would require automatic tracking rigs, and sophisticated motion tracking software.
Im sure you are aware of Hessdalen, and the results obtained there.