There is nothing wrong with the concept of M+ dungeons or a similar system in FFXIV. Anyone spouting the line of "Hurr keep wow out of FFXIV" fails to understand that every single mmo borrows from another, they just reskin it, tweak it and call it something else. While M+ dungeons, especially +15 and higher are incredibly fun and skill based, It really wouldn't translate over to FFXIV very well without some major tweaking. I'd like to see them implement something more to keep dungeons relevant outside of verity farming and leveling/daily roulettes, but It would have to be vastly differen't from how M+ dungeons in wow work. I think they should focus more on making hard mode dungeons feel like they are actually challenging with very unforgiving mechanics if you screw up, add some incentive to either clearing it as fast as you can (not a timer) or a incentive based on how many deaths you had before/if you completed it.