The thing with the ESC is that you always have a "general" feeling about the songs, where all the songs gather in your mind and you try to make a synthesis of it, and then your opinion on each individual number.
Since 2009, when I started watching the ESC closely, 2013 is the only year I thought was "weak". Proof being that I wasn't very satisfied with my personal top 10 and could have switched many of the songs from the top spot (I finally settled on Moldavia). However, if taken individually there were loads of good songs in ESC 2013: Moldavia, Ukraine, Norway, Sweden, Denmark, the Netherlands, Hungary, Iceland, etc. It's only all the songs taken together that I found weak.
2014 I think is turning out to be a pretty decent year and many traditionally strong countries have yet to select their entry (the three Scandinavians, Greece, Cyprus, Germany as of late has become an excellent ESC country, Azerbaijan). So I'm pretty optimistic actually.