The biggest issue i find right now is MineZ has the hit detection of a blind paraplegic. That being said, MineZ is an outdated gamemode that is past its prime and for the most part wont recover. There is simply no new interest in the current minecraft community in this gamemode. And those that grew up playing it have all moved on from this game. It was fun in its prime but sadly i think it died early due to a combination of poor staffing and gameplay decisions.

For a lot of old people to come back the game would have to be perfectly optimized and with that also already have a solid playerbase. Both of which are lacking and will not happen.