I would like to add to a problem that I have mentioned before here and in the forums, and that problem is how wing sweep affects the CP position.
For the two unlocked airliners coming with the sim, the 747-8 and the A320, it can be clearly seen that for the both of them, featuring a significant amount of wing sweep, their CPs appear to be in front of their CGs, by a significant amount.
My hypothesis is that the sim considers the longitudinal position of the MAC to be the same as the position of the wing section located at the centre of the fuselage. It can be seen by using the Sim Forces overlay alongside with the Pitch overlay and the Weight window from the debug UI.
When setting the wing sweep to 0, the CG and CP positions correspond to the one set in the config file. However, as soon as a sweep angle is introduced, the fuselage centre section of the wing starts shifting forward, as seen using the Sim Forces overlay, and so does the CP in the Pitch overlay.
I think that to solve this problem, the MAC and the CP longitudinal position should become independent of the wing section at the centre of the fuselage.
Please take that into consideration as it is an important topic having big consequences for the physics of the simulator.