Of course they did, SNK turned their attention off other games and focused on doing KOF only. Of course it would be their best game, they've been repeating the formula since 94.
Their best Samurai Shodown is the second one, everything beyond that is shit, and SS II is from 94.
Ninja Master's is pretty fun game, great competitive design, the only think that probably killed the game were the infinities which could easely be tweaked with a sequel and more so.
Basically, when SNK is to release a new title and they announce it, is more like "Oh, look, a new KOF, so impressive SNK" for a company famous for many great titles at the time, new kof.
Spend a few time off, new kof, same bullshit everytime, game mechanics are hardly redesigned, the roster isin't as half impressive, rarely new aditions, characters with no background, i've been seeing the same damn roster since 2k2 to 13, the plot from KOF sucks, their best plot was the Orochi Saga which ruled from 94 to 98, post that, pure bullshit, they came up with the NETS saga, that sucked, came back to Orochi again in 13. Really?
I have no doubts KOF13 is a good game, the redesign and new additions to mechanic was a smart move, but those dream cancel loops are fucking boring after a while, i fail to see the hype in it.