Well, judging by the 3" guns and their directors this ship is from the late forties at the earliest, so It'll need search radars.
fixing that.
To me it doesn't make much sense to carry both twin 3"/50RFs and quad 40mm since one was designed as a replacement for the other.
fixing that.
The single 20mm gun doesn't make much sense either, especially not in its current position.
I have told that 20 mm that he has no right to stand there, thousands of times, but does he listen to me ...
And lastly, by this time floatplanes had largely been replaced by radars. It's by no means impossible to carry one, it's just unusual.
I take it as it looks sexy and unusual. and it is nice to have.