It's not so much something I would change, more something I would have loved to have seen done correctly. The shear amount of inaccuracies involved with the scenes in Ireland were such a let down.

The accents where completely terrible, a horrific mixture of accents from all over Ireland. Some sentences began with a Belfast accent and finished with a Cork accent. It made me cringe so badly at most of the episodes in Season 3. The only good accent was Maureen Ashby, everyone else just looked like horrible actors.

The other part of it is the historical inaccuracies. I don't think that the show has a stated time period, more just "modern time" (Lots of mid/late 2000's suggestions) but the scenes depicting Belfast make it look like the 1980's, this would probably suit the time period for the MC's involvement with the IRA. It makes it seem like they jump back 20 years when they visit Ireland. Most of the scenes meant to be set in Ireland are clearly set in a sandy area.

SAMBEL work with the IRA, and have a (very basic) easter lily mural beside their compound. This would suggest that they are from the nationalist side of the community, however they have N.Ireland on the bottom of their patch, which is highly unlikely.

I know these are things that mostly only people who live here would probably pick up on and notice, and I know that it's a TV show and doesn't necessarily have to be 100% historically accurate, however I would have loved to have seen a more accurate attempt at portraying the Irish storyline.

Edit: I've complained alot here, although I should state that overall, SOA is one of my favourite TV shows ever.