To help you guys let me just quote the kickstarter as well
This is the underswamp picture
and from the march the 4th update:
We've already funded their home with our first stretch goal, the Underswamp. So now let’s get them to settle in. Besides, they’re the only intelligent creatures that would actually like to live there.
I leave this open to the fact can any of you tell me how the hell concept A looks intelligent other than basicly looking like lizard goblins…
To help induce the Lizardmen to move in, let’s unlock the Dire Grove, a special area within the Underswamp. The Dire Grove is dominated by a massive species of swamp willow. These willows make fine roosts for Lizardmen treehouses. They also bear a fluorescent green berry, which is said to have an odd magical effect if consumed.
I overall believe that the lizardman concept B far better suits the environment proposed for them and that Lizardman A completely doesn’t suit that environment, i can imagine the more geckofrog like concept B works far better in that environment than the midget goblin lizard of A, i leave it open for one of you A guys to argue why your ones suit the environment when they would most likely be submerged.