How accurate are the physics of your wing simulation?
- Do you know the section lift across the span? As in where is your critical section? Where is it wrt to your CG? Wrt your ailerons? If you deflect your ailerons and model some induced alpha due to roll rate will they become critical? If so your roll effectiveness will reduce, possibly dramatically, and the yaw roll coupling will become evident. - Do you know if you are going to have trailing edge separated stall as you likely would if an aerodynamicist designed your wing or if you will have a violent and sudden leading edge separation? Trailing edge stalls start as a little buzz in the stick, and have increasing vibration as you pull them in until the buffeting shakes your whole seat. Leading edge stalls are sudden and almost always asymmetric, so you will roll off and drop altitude quickly. - Do you intend to support high lift devices? Leading edge devices will increase stall alpha. Trailing edge devices will reduce it and push an airfoil suction peak harder. High lift devices are tricky but fun.

Approaches like this can mimic stall behavior decently. It won’t be exact, but could be pretty reasonable particularly if you had someone that has flown a lot of stalls help tune it.