if you keep the APAR, you should heighten it a bit, that should eliminate most of the blind spot (or lower SMART-L, but that seems not that good an idea)
still, check the angles for where the structures block the radars, and where the deck edges do
only from that you can see if the setup really works
on the MRSC, shouldn't the D3 deck be splitted? it seems close enough to the waterline to make it create wave resistance if not creating actual water resistance.