To get back on point, the A320 is limited in pitch, with hydraulic failures, to allow the pilot sufficient control to quickly maintain the required lower pitch in the event of an engine failure. Pitch authority is limited given the conditions shown by the original poster.
Under Normal Law, Attitude protection, the ac is pitch limited to 30 degrees up and 15 degrees down.
And why is there no pitch limit in case of going around with a G+Y HYD failure?
The pitch limits, or lack of limits, in the OP, dont make sense, especially the lack of limits. ie Is the 15 degree limit mentioned in the OP up or down?