Let me get this straight... you want to use an AI aircraft as a plane to fly yourself and are disappointed by its hand-flying characteristics?

I have a little, VERY little experience tweaking flight dynamics (my biggest achievement was to tame the default FS9 C182 and make it finally flyable... or at least MORE flyable than the default one) and I know the difficulty of having to modify a FD thought only for AI into a flyable one. It's usually faster and cleaner to trash totally the old FD and start anew, and that is quite the amount of work... can't you simply look around for a Mig 29 that was built as a flyable plane? It would surely come with a VC too, thing I do not believe the AI can boast about.

Just as a technical curiosity though, what are exactly the problems you find with the actual FD? If it's nothing really complex I just might be able to give you some pointers on what to modify to make it bearable (no success guarantees are implied).

This may be just inside the scope of my experience.

If power reduction is needed, open the Aircraft.cfg with a text editor. Search for the tag [jet_engine].

Should this tag be inexistent, create it yourself.

Under this tag find (or add) the line thrust_scalar= knowing that after the equal sign a parameter needs to be added.

If said parameter is 1.00 the thrust power will be unchanged. Values BELOW 1 will reduce the plane's overall thrust power and values ABOVE 1 will enhance it instead.

Search by yourself the correct, or what you think is correct power setting for the plane editing said parameter. After a change in said parameter FS needs not to be restarted, only the plane itself will need reloading for the changes to take effect (sometimes, if the sim seems to give strange results while experimenting with scalar values, load another plane then the Mig again to clean out all the accumulated variables).

Try and let us know.

You simply have to input a lower than 1 number which amount will set the gearing down ratio of power compared to the original output, and actually you aren't limited to a resolution of only one hundred to one... if you select, for example, a number of =.5 you'll have halved the power, if you input =.01 you'll have one hundredth of the original power, if you input =.001 you'll have one thousandth of the original power, and so on.

Just start conservatively to not end up with a C152-like powered Mig. If the plane REALLY exhibits too much power, start with a =.1 (a tenth of the original power) and proceed tuning it up (or down, as case may be) from there.

Remember that, like in pure mathematics, the zeros after a numeral after the dot (example =.10) are useless if not for show, and you can safely omit them. Same for the zero before the dot, hence the =.1 and not =0.1.

Ah, I seem to have forgot to specify that the little trick I showed manipulates the THRUST of ALL the jet engines of a given plane, not the power of the engines themselves.

Similar in kind to the line power_scalar= under the [piston_engine] section of a prop plane, serves to manipulate and fine tune engines output acting as limiters or amplifiers, as needed.

Have fun.

Really not a problem. It fell into the "tricks" category and not really a matter of Flight Dynamics.

PS
I don't think my approach to a job it would really work in M$. I would try and make things right, and they would try and make things expeditious even if at the expense of quality, as usual for them. Resulting in me ending up fired in record time.