Idea:
An area to build your own map to play on with the upcoming custom servers feature.
More information:
The regular maps would be templates to use for your custom server, but there should be an option to create ‘New Map’. You would be able to name your map, place (generators, checkpoints, etc) anywhere you like, and other features from every game.
Hmm, could be interesting, nice idea!
however, it could take a while to build even one map, as all the detailing needs doing
hmm maybe a layout for the maps! and you can replace the blocks manually/with commands
Hmm… idk about this. I mean for example, if you were to try and make a treasure wars map, how would you paste in the generator, shop keeper, and treasure? I don’t think the hive could program that.
i mean yh they do mostly follow the idea of upside down cones
Hey!
I’m not exactly sure this would be possible.
As for server-wide maps, those are made by the Hives in-house Build Team.
You can apply for level-designer position on the Hive Build Team if you wish to create maps for the Hive, through the link below.
Level Designer (FULL/PART-TIME) - Hive Games Limited
Please note that you must be 18 years of age, unless you are a resident of the UK in which case you can be 16. Serious enquiries only. 
Well this is cool, creating a custom map!