IMO, Titan HM is the most poorly planned progression point in the game right now
Reasons
1) No incentive to re-run it. Once you beat Titan HM you're done. You probably have advanced your relic quest to this point by now and thus Titan's drops mean nothing to you. You no longer have to care because Titan's drops are outclassed in every way by Relic.
2) The duty finder set-up for it demands perfect gear from DPS, the second tank has no responsibilities like they do in Ifrit or Garuda and are just chaff that inhibits the potential ability to win. Also add in the above point where you basically wind up with a situation where nobody in your duty finder group will have cleared the fight in all likelihood. You wind up in this Loser-Hell with all the people who are effectively brickwalled by the fight.
The result? A fight nobody wants to do unless they need it still and close to literal inability to progress through it in duty finder in most cases. Yeah, I'm bitter.