Check this out if you haven't seen/heard about it before... http://maxbarry.com/squiggle/2014.html
You can use the drop down in the top right to look at teams from other years.
As you'll see Hawks 2014 is considerably better than Hawks 2011. You'll also see that Hawks 2014 is right up there with St Kilda 2009 and Collingwood 2011 who were both very defensive sides compared to Hawthorn 2014 who were very offensive.
Also notice how while Geelong's 2011 flag is one of the best of the last 20 years (though a bit blown out due to belting Collingwood by 16 goals late in the season who were fading late) Geelong 2009 is one of the worst.
At worst Hawthorn are clearly in the top 3 sides since 2000 as per the op. I personally reckon Hawks and Geelong sit fairly equal with Brisbane not far behind. Next year could prove to be a tie breaker of sorts. And with all the improvement Brisbane has made to their list this off season it might even be them that takes it.
I agree with this but surely you are not suggesting that the Lions are a 2015 flag fancy