Factions and Skywars are the only ones I'm joining for. I may join wanting those two but i know I'll leave liking other game modes just as much. As a leader board player on both of those game modes I'd like to see them added.
I hope they add actual pvp, A lot of pvpers are quitting for Hytale and me and a couple of other leader board players are going for leader board positions. If it doesn't have good pvp then the pvp community would have been split in vein.