They had some other interesting problems. The big one was that the chines allowed very high angle of attack turns. The result was that you could actually stall your engines without stalling the plane (the engine inputs would blank and you'd lose compression).

That's not a problem you'd have with other planes either because usually the wings would stall first. This is a problem because you don't get an aerodynamic sense of being near the danger zone when things go haywire.