Should I ditch Blarney from my plans?

I will be in Cork for 4 days - one of which I will spend in the city and the others for day trips: Killarney National Park, Ballycotton Cliff Walk and Blarney Castle/Stone. I am reconsidering going to Blarney - I don’t really care of having the experience to kiss the stone, I mostly go to places for scenery rather than pure cultural interest and from what I heard / read it seems like the Castle is also a bit overrated and not worth the entrance fee..

I’d like to hear your opinions and, if you think it’s not worth it, what day trip I could replace it with? Cobh seems pretty, for example.