Gamemodes. We need gamemodes that will attract more players and get rid of the ones that are unpopular.
the unpopular ones are things like TD, because people simply dont know how it works, get rushed too easily by people who do.... some games just need more changes. featured games are unpopular because they change every once in a while, so some people will only join when their game is active.
when it comes to new gamemodes, this is not always the case. i think they should keep focussing on improving current gamemodes more and see what the community wants when it comes to this topic. for example how to make emeralds actually usefull in eggwars.
most of the players on any server will be the non-players, like myself. i can give you one very simple reason why any server would be prefered over cubecraft; party limit. only 3 people in a party is such a painful limit, especially since you're unable to choose the team size for games. this has been suggested a million times and most people disagreeing have been ranks who dont know this problem, which kinda "demotivated" the idea.