The sad thing is, this isn't news. We all know that there are multiple international corporations in Ireland because of the tax evasion. This isn't just Apple, but if you aren't a multi-national you won't see those tax benefits.
More so Ireland has facilitated this to win jobs, I do not think Apple just paying the taxes is enough here. Ireland itself should also be punished as should other companies who have these special arrangements with Ireland. Now these companies are in Ireland they aren't going to just move and so this still remains a win-win for Ireland winning business in illegal methods. And let's remember, Ireland is part of the EU, Ireland has agreed to follow the rulings of the EU and there were laws against these SPECIFIC practices. The EU is perfectly in their rights to make this ruling. Apple and Ireland are just bitter, Apple since they have to pay their dues and Ireland since it'll put off other multi-nationals moving there in the wake of brexit that Ireland would hope to win with their illegal practices.
The only surprising thing is that it took this long for the EU to actually do anything about this.