I have quite a few years on survey and ems 350's. Yes, the cracks is something you always look out for especially on the door posts near the pilot door hinge attachment. However, there are pretty straight forward repair procedures if you catch it soon enough. If not, debonding of the composite will occur due to moisture absorbtion. I have only had one cracking along the canopy on the outside just above the upper pilot door hinge. We caught it before it took the turns which would have caused it to run right around and since had no problems again although we watch it closely after the repair.
I do agree with the doors off scenario's.