The skyscraper, on the edge of Liverpool's tall-buildings cluster, has been reduced from 37 storeys to 30 due to its impact on views of the World Heritage-protected waterfront.
However, after the CABE report stated its 'serious reservations' about the project, the scheme has been reduced.
The practice's tower is not the first in Liverpool to be chopped down to size, with John Lyall seeing his waterfront scheme cut from 25 storeys to 17 late last year Lyall trims tower in bid for Liverpool approval.
RMJM's Roger Whiteman said of the-new look scheme: 'We had to submit the planning application earlier than we would have wanted, and we knew there would be more work to be done afterwards.
'We had many consultations with CABE, English Heritage and the planning authorities, and we came to an agreement, knowing we had more aspects of the scheme to look at.
'We worked through the design when the comments came back, looking at many aspects such as the different views, and came to an understanding over the height of the tower.'