Not everyone's cup of tea, but the Irish Red is a good seller for a couple of the micros, and is a good "gateway beer", as our American friends like to put it.
Dunno about Irish Red as a gateway beer in Ireland. I think most people see an Irish Red and decide whether they will like it or not based on how they feel about Smithwicks. And there's a few on the market already.
I think new beers of an unfamiliar style have more chance of being tried than new beers of a familiar style.