If he has a serious problem with drinking, I doubt he would've forced his way into the starting XI and have both England and Ireland clamoring for his services.
He's fit and playing at a very high level. Clearly was not a problem during the season, and for all we know, this is a one off.
I think people should just calm down a bit and lower the pressure already on his shoulders.
He was blowing off steam on holiday, not a big deal.
If it becomes a regular thing, then we should be worried.
Until then....Relaaax, Winston