It's the Tank supporters vs. the DPS supporters. Clearly there's more DPS players, but eliminating the Tank population's desires only serves to hurt everyone.

I myself am not invested anymore now that my dream was realized with DRK being announced as a Tank, though I did want SAM to be a tank, in similar fashion to Log Horizon. I personally think there's loads of potential here. An ultimate tank move could be centered around not taking damage like PLD's, and instead, countering every attack for example. Also, DRK is a magic, greatsword tank, so the two do not overlap in all honesty considering that NIN wields Katanas, which are more similar to Great Katanas than Greatswords.

Of course it could be a DPS, especially if they go in the style of a Ronin... So that said, I think they should make two jobs. A Tank, and a DPS. This should please everyone. Shogun and Ronin, GO!