"So now Ireland can have shooting practice against the Saudis "

That's dangerous thinking. Ireland's strength has always been playing teams which are expected to thrash them. They won't have that when they play Saudi Arabia.

And the chances are, whichever team does least well against Saudi Arabia is headed home next week. (Though if the Cameroons were to beat Germany that should mean Germany is headed for home, in spite of that 8:0 victory)