Very good post, HvyEng.

I just like to add that you must forget all EPR values on FSX engine model planes, they will never get accurate and all available payware birds using them suffer from this lack of accuracy.

The only accurate addons are the ones which use their very own engine model, not just some FSX altered values for the generic "jet engine" there.
You will be too low powered if you use those readings in FSX on the standard models. N1 comes closer to somehow realistic data but this still isn't a thing which can be called accurate.
I don't blame CS planes here. As said, most of nowadays addon planes go standard FSX there but you can check any other CS plane you own to see that even the 767 and 757 don't develop normal (realitstic) readings related to the actual thrust available.

I think that the drag tuning and maybe some CG one too can give this B-52 a more realistic feel but all things further than this will be too much for a fun and low priced product in my eyes.

Even on the more detailed models a development of a special engine model is to question as surely a big amount of users just "throttle up" at takeoff.
I would applaud to it though but I know that there is quite some development necessary to achieve that just some users ever recognize the change while others might struggle then.

One can recognize this standard engine model on his planes by manually starting the engines.
If they go "bam" and are running, you surely use the generic jet engine here.
A real engine spools up slowly and loses it's EGT over quite some time when shut down. Our current ones here and on most payware stuff do this in seconds.
So be aware of the limitations and expect some effort on more effective fileds of tuning. Drag and CG were mentioned and I think you have quite some expertise to help there.  :)

So while we expect this addon to become more realistic, we have to stay like this too and don't expect huge development efforts on lower priced products.
I appreciate the thread opening from the Captain Sim side, so there is some interest in enhancing the fun experience it seems.