The kits were almost all let-downs, for me.
The Koreans' were far too safe and similar to what's come before (2014 WC, 2015 TC... come on, guys). The MAS were more interesting, especially the yellow, but I don't consider "let's do some zig-zags" to be design; they looked like a superhero a five-year-old might draw.
Yonex? Can't even remember any of theirs.
The ones that really caught my eye were the red Li Nings - that's how you do a shirt! - and, to my surprise, black Team GBs. But they missed a trick with the piping: left sleeve red, collar white, right sleeve blue!