I don't like coraline all over the rock either...it makes it all look the same and the diversity in the rock colors look nicer IMO...some coraline is awesome, but over time when it is on EVERYTHING but the front glass, it really makes the tank look blah. Like you said it is inevitable. A diadema urchin is what eats coraline, but it takes a ton of algae to keep one alive and they get HUGE fast. LOL...I learned to live with coraline.
Nice to see im not the only one that doesnt like this stuff. Its a shame there isnt a smaller critter to wipe this algae out. I dont know if i can learn to live with it. Km debating if i want to continue with salt or just go back to fresh and start a planted tank.