The Latest update edit: It seems that something has happened to the creator/person who maintained original mod - TheRealLemon. Fortunately, there are alternatives.

As some of you may know, the mod's author is working on a 1.6 version. Here's his latest update:

"They changed a lot when it comes to map generation and I'm struggling generating the previews. I've successfully removed hugslibs as dependency.

That's where we stand currently. It's really hard to give any eta and I don't want to disappoint anyone when I miss any self set deadline. Please be patient."

For those of you who don't want to wait, I've found some alternatives (and others have also found some). While they don't fully replace the original mod, they can help in the meantime. I personally will be waiting for the update of this mod.

Here are the alternatives:

• Map Preview
  Preview a map and reroll the seed before loading it.
  https://steamcommunity.com/sharedfiles/filedetails/?id=2800857642
  
  
• Better Map Sizes:
  Customize map size.
  https://steamcommunity.com/sharedfiles/filedetails/?id=2099101052
  
  
• [Ling]Move Steam Geyser
  Relocate geysers.
  https://steamcommunity.com/sharedfiles/filedetails/?id=1547361568
  
  I'm posting this here so the information doesn't get lost in the comments.
  Hope it helped.