I agree!, it seems o'haras is the only stout fitting the bill. I love to try all styles but particularly a stout!! Im a stout drinker!!!!!
The irish brewers seem to be slow at catching up with the rest of the craft beer world but in saying that id hazard a guess and say the stouts arent as popular as ales and lagers in ireland. Our craft brewers are trying to survive and grow so are maybe reluctant to move away from mainstream craft tastes. People that i know seem more interested in pale ales then stouts. Hopefully this will change.
I think in particular what you are seeing with the irish boys, is they are trying to get into new territories eg pubs with little/no craft, and expand into craft pubs.
Its a little bit like chicken and egg, the brewers want to sell what they brew, get known, and can then create outside a core range.
Like i said, WJ Kavanaghs are pouring Bru Dubh regularly, and as far as I know have taken out O'haras stout. The Westgate in Kells which is another Bru supporter is regularly pouring and the feedback i've heard is a lot of lads who were Guinness drinkers have moved across.