This is a nice scene John, it has a killer foreground, the arrangement of the sea weed rocks is very pleasing and dynamic. I also like that you got down low and used a wide-angle lens here. The back-lighting on the seaweed also looks awesome.
In terms of suggestions for improvement, as @Brian_Schrayer noted, there is a slight CW tilt that should be corrected, and if this were mine I would take a crop away from the bottom, to just below the reflection of the rock in the LLC. This would reduce some negative space in the water in the LLC.
In terms of avoiding flare, there is another approach to avoiding it rather than waiting. You could have shot a 3rd bracket, where you place a finger over the sun, this would prevent the flare from wrecking havoc with the foreground. You could then use this bracket for a foreground without flare, and blend it with another bracket of the sky without the finger. I illustrated this technique with another post earlier this year, see the link below.