Absolutely. Part of the reason why I'm also pro-European and a remainer. EU membership has some pros and cons, but in my simple head the pros surpass the cons. The EU has many issues that still needs to resolve though, with or without the UK.
Having a central currency but with different economies of different gears and no centralised fiscal policy is, in the long term, a recipe for disaster. The inability for certain countries to devalue the currency by printing money (like the UK did) in the face of financial crises, nearly sunk the Med region. Interests among members conflict and they appear more competitors than partners at times.
Migration is another big problem. Both the legal and the illegal kind. A lot of people don't generally like the racial/ethnic profile of their country changing too fast. Change is inevitable, but the faster the rate of change the more people will kick back. Especially if there are financial crises when migrants will get inevitably scapegoated for it.
Call it xenophobia, racism, bigotry, or lack of education if you want... it's still a factor you can't ignore. It's a reality. We don't live in a Utopia. If we did Communism might have worked. Currently Schengen is under threat, borders are shutting across Europe and right-wing parties are gaining massive ground everywhere. We can keep harping on about how migration is beneficial all the way till the EU collapses and it won't matter one jot.
The scales are tipped drastically towards the Pro side for Ireland.
Whatever about the problems of migration today it'll become a problem won't it? With the rising temperatures large parts of the World will become uninhabitable and immigration to northern europe will explode you'd expect. From a humanitarian side you'd want to say take them in and do your best for them. From a selfish side ... it'd probably be tempting to lock a lot out and basically leave them to die