All of this looks much like personal opinions, not a general Feeling of the Community. Most people are beyond hyped for the new Dark knight and it will porbably be the most played Tank at the start of the Addon beside Gunbreaker. Warriors will be few simply because they didnt get anything new. The animations and skills they got are all recycled from old skills or 3.0 PvP.

Paladins: yeah well Paladins are just Boring. The whole Class or Jobfantasy behind it is boring and it didnt help that Paladins were FORCED and YES i mean FORCED to play offtank the entirety of stormblood because of enmity issues.
So i think Dark knight will be overplayed till the hype died down a bit.

I assume it will look like this regarding tanknumbers: DRK, GNB, WAR, PLD