Barrel of Fun
Abort, retry, fail
Which teams that AREN'T in this euros would, more often than not, actually have a team worthy of being there? Obviously there's us, and I guess you could make a case for Denmark, Bulgaria, and Serbia being countries who have at least qualified for a few tournaments in recent years. Beyond that though it just means about half a dozen extra spaces for total joke nations like Scotland.
There is also a case for more money and interest being generated for those countries that do not usually qualify. Such as Hungary, Latvia, Slovenia etc.