My short answer to this question would be "no, it's definitely not worth the trip".
For a longer explanation, RR is the only WDW restaurant that my DH asked me to not book again, after our third time trying it. I kept trying it, because many people here seem to love it. I was thinking we must be ordering the wrong thing. After ordering several things on the regular menu & 4 different things on the brunch menu, I've come to the conclusion that it simply doesn't compare favorably to good Irish pubs. We have two nearby that have much better food. If you don't have a good Irish restaurant near you, it's worth a try. I can see why that type of food would appeal to people that don't have something better to compare it to. We love our local Irish pubs.