I have exactly the same "problem" and I was just about ready to ask if there was any parameter I could manipulate to facilitate more branching and vertical growth instead. All my SPS seem more interested in developing a wide base or thickening their branches than growing vertically - they must be the offspring of siblings like yours
I also have the same apparent lack of coraline growing and any other algae that you do. The corals expand at their bases and add mass at a decent rate but I don't really have any algae growing (including coraline). And before anybody asks - yes my Mg, Ca, Alk, pH, temp, PO4, NO3, SG are within optimal ranges (with the exception of NO3 being 0 with testing using Elos and Salifert kits).