Excessive pitch during GA is a normal occurrence on 737.. it should be grounded.
If pilots can't fly a normal go-around in a 737, that doesn't mean the aircraft should be grounded. Its characteristics in a go-around are not to be unexpected in a high-performance jet aircraft with under-wing mounted engines and virtually zero flight control augmentation. But if people think you MUST pull hard during a go-around on a 737, then somebody should change their mind with training, not by grounding the aircraft.