(first I play the bedrock version) So I thought it could be very cool to have an underground map. So picture like one of those huge new caves, filled with lava, water and crystals this would be a quads map.
Also like some of the other posts said there should be more lucky block drops to keep it random. Maybe some of the drops could be, Wither skeletons and theres a chance for them to drop their head and when you equip there head it gives you health buffs. a shock wand when it hits a player they drop the item in thier hand and freeze for 5 seconds, pufferfish, killer rabbit,
For a solo map maybe a train map, each island is a train and the middle is a bunch of railroads and a train station. or a snowy map like the snowglobe map but less christmas themed
Also duos pls.