And by worst you mean best.
Ridiculously Good Tier
Monogatari SS
Uchouten Kazoku
Gatchaman Crowds
Servant x Service
(Hunter x Hunter)
Great Tier
Love Lab
Silver Spoon
Stella C3-bu
Kami no Inai Nichiyoubi
Good Tier
Watamote
Kitakubu Katsudou Kiroku
Symphogear G
Not Half Bad Tier
Free!
Inu to Hasami
Blood Lad
Shingeki no Kyojin
All Right Tier
Futari wa Milky Holmes
Fantasista Doll
Gen'ei wo Kakeru Taiyou
Shit Tier
Danganronpa
Even if you only look at the very top tier, I think those four alone make this season better than most in recent memory. I can't think of many seasons with four shows I can unequivocally call absolute top-tier stuff. (Five if you count Hunter x Hunter, which is always excellent but is getting into some particularly good material lately.)
But even outside of those four top shows, I think the overall level of quality this season has been remarkably high. I can't think of one show on that list that hasn't kept me well entertained in one way or another, and there are an awful lot of shows on that list. Even Danganronpa has been entertaining on a hatewatch level (and hatewatching isn't something I usually go in for). There have been a lot of pleasant surprises (I don't think anyone was expecting Love Lab to turn out as well as it did, Symphogear has been a real improvement over the first series, and I went into the season with hardly any expectations for Servant x Service or Kaminai yet both turned out really nicely), and even the disappointments have had their silver linings (Futari wa Milky Holmes inexplicably threw out almost everything that made the series great, but still managed to be pretty entertaining for what it was, and the aforementioned Danganronpa hatewatch was a surprising bonus when that show failed utterly to meet expectations - plus hey, at least it solved the problem of whether to recommend the game or the anime to newcomers!).
The only real negative of this season is that not enough people seem to have been watching Kaminai. Which is a shame, because I feel like that series would been one of the more conducive to interesting discussion if there were more people actually discussing it.
(Also, though it's not on my list, I get the impression the new Rozen Maiden is supposed to be quite good. Can't speak for that myself since I'm not one to jump into a franchise midway, recap or no recap.)