It's funny how divided opinions can be.
My family didn't "get" Raglan Road either. I thought the food was really heavy, lots of grease etc. It was crowded, loud, with a lot of adults spilling out of the bar area, there for the beer it looked like to me. You know, you kind of expect that with an Irish pub.
We had a really nice meal sitting outside on the Boardwalk in the late evening at Big River Grille. It was relaxed, our server and the food was good, and the kids were comfortable there. So I'd choose Big River but I guess it depends on what you are looking for. Big River seemed more family and laid back to me. I know Raglan Road gets a lot of good reviews but again, we just didn't get it.