I am not sure if you still have a blindspot. Remember the PARs start by facing 45 degrees from the ship's centerline, and the sides are going to be more than covered with a 120 degree arc, or maybe even a 140 degree arc. The question should be how much -db loss from the beam steer. They should have already figured all these out, long before they can top this with multibeam engagement against multiple targets or extended range against a single or few targets.
I believe these things are going for the 054B/057 next gen frigate, and they may or still may not go into an integrated mast.
The other theory is that these are not SARH illuminators but datalinks, with the HQ-16 now converted from SARH to ARH guidance.
The MR90s should mechanically rotate.
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