That's my take on it too. The fact is that, to coin the words of Rick in Casablanca, "the problems of two little regions like us don't add up to a hill of beans in this crazy world", in other words, the issues of Britain, and Europe, will be small-scale in comparison to the greater powers/forces at work in the world currently.
The only thing that could be said in favour of Britain remaining is that a stronger Europe (not just politically but also economically) will be in a much better position to stand up to the greater forces (USA, Asia, and soon to be South America probably) now wrangling for position in the world order.
Also Russia's influence in Europe especially is highly significant. Meanwhile for Britain itself, it's hard to see anything but hardship come from this situation. And because despite what the politicos are having to be heard to say & do up front, both Britain & Europe know they need each other badly so what's going on behind the scenes is what we really should be wondering about.
On the positive side, the Brexit thing has thrown Europe into revising it's federation, and there's an opportunity there to reform the things that weren't working. Beyond that, it's all about choices, and forces. How well will reform be done, or come about? In the past, basic fears, and desires to prioritise protecting what "we" have on a narrow level has led to big wars etc. Times have changed and Europe is no longer the 'centre' of the world in many ways, long gone past it. The ageing population of Europe as much as anything has led to a loss of younger, more talented ability within the structures of power. If that isn't change then reform will not really happen.
Needless to say, Ireland is still an anomaly in Europe, with such a young population, even after all the emigration. However we are still under a government that is out of touch, and very limited in ability.