Not sure I like the idea of Irish being in the same culture group as the UK. Since we can't have separate policies for different ethnicities in countries, it'll mean in game terms the Irish are treated the same as the Scottish, even though during this period the Irish experienced a famine during which a quarter of the population (two million people) either died or emmigrated, all the while the English were making them export massive amounts of grain (Low lie the fields of athenry). The prevailing attitude in England at the time (and up to about the 1950s/60s) was that the Irish were "white niggers"-inferior, basically. The thought of the same thing happening in Scotland would have been unthinkable.
I realise historical issues like this are difficult to handle and I'm sure there's no harm intended but I do find it a bit sickening.
Nothing much to do with the developers diary but this is blatantly untrue. The British government of the time was laissez faire and wasn't totally aware of the situation in Ireland, prevailing economic opinion of the time suggested that they shouldn't intervene because it'd just make the issue worse. When it became apparent to Westminster just how bad things were going they did pretty extreme things (for the time) such as buying up mass amounts of maize from America to distribute amongst the Irish.
Furthermore it was IRISH landowners who refused to stop exporting the surplus production, the government believed that they should help the people dying on their land, as per the era's belief in charity above government handouts. The Irish landlords decided not to and to continue exporting the food instead and continue making their profits. It was internal issues between the Protestant landlords and their tenants that had a lot to play in exacerbating the famine and the British government actually went above and beyond what most governments of the time would have done.
Furthermore the potato famine in Highland Scotland caused 1.7m people to leave Scotland, so no there wasn't any difference in policy between the Irish and Scottish, especially during the famine of the 1840s. It's easy to spew the nationalist Irish spin on things because it's been almost mythicised by supporters of Irish nationalism into the truth but it's simply not.
The British viewed Ireland as an integral part of the Union and after Catholic Emancipation tried their best to reconcile the Catholic and Protestant elements to each other and nearly all the Protestant population of Ireland was loyalist, so I don't see why the Irish shouldn't be tagged in the British culture, hell if it wasn't for WW1, Ireland would probably still be part of the UK but in a devolved form like Scotland now.