What's just about guaranteed, even at this point of non-availability here of the conditions of permission and considering some observations, is an appeal to An Bord Pleanala. Ideally the design would have been subject to a competition, just in order to compare contrasting visions for this prominent site. The additional 30m or so of permitted height sets a precedent for tall buildings in selected locations in Dublin, unless a condition of permission says otherwise of course. If finally permitted without a height reduction, it would be Dublin's tallest building, (superceding what currently is, proclaimed here at least:
List of tallest structures in Ireland - Wikipedia, the free encyclopedia by the Church of Saints Augustine and John, Thomas St.)