The nose goes up with ground spoiler deployment. He felt the sink with the spoilers deploying in the air, the nose went up, he pulled back more to try to save the landing. There was a thread a while back about pitch attitudes for tailstrikes in the 320, I don't remember the number for struts extended - about 12 degrees? anyone? A average 320 touch down is about 6 to 8 if flared.
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The FCOM does not recommend the nose being held off for aerodynamic braking. I don't think any transport aircraft would recommend it. If you get in this habit it will bite you when you experience a strong crosswind.