hi and a warm welcome to epz.
this looks really nice in the thumb view but to fair seems to lack that biting quality i am used to seeing in seascapes on this site. indeed there are some real specialists in the genre on here.
i know the equipment you use is more than capaable so i guess a lots in the processing. i also like seascapes and i guess you may find some in my showcase or back in the pages somewhere.
compositionally the base is the most interesting area and i think a downward tilt or a lower viewpoint (preferred) to reduce the sky a little and add more foreground would have been good, and somehow the focus dosnt seem as crisp as it could be in the fg and that water detail is really very nice. some selective smart sharpening with a slightly larger rad may add some good texture to the rocks.
i think there are some colour balance issues towards the cyan end in the sky and im sure you could get that in raw adjustments or white balancing by a variety of methods.
another suggestion is to not exceed f16 as lens performance drops off usually eather side of a f8-f16 range and although im unfamiliar with that lens i feel confident the performance graph will be falling at f22. shooting at 200 iso would have been fine and the sensors are usually optimised for 200 iso anyhow. this would keep your speed the same to slow the water down.
i see you have some flare issues in centre of rocks and this is usual when shooting pretty much head on to the sun, usually best to keep the sunball just out of frame if you can and this is often compensated by having some of its light falling across the rocks .
its a lovely scene controlled well with the grads but i think you could pull an even better result from this raw file.
this is all subjective and its down to you , and of course there is always the chance being a first upload that you didnt mean to enter the critique gallery but thats where i found it.
enjoy your scaping and above all enjoy this terrific site.
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