Scenery plays a big part too - no one has mentioned the fact they are aquatic. Being aquatic brings huge benefits but my gaming group HATES using rivers and ponds for obvious reasons so we normally skip them
My Lustria Terrain generator chart does slightly favor Lizardmen style of play.
Lustria/Southlands
2-Inpentrable Jungle (raised impassable feature)
3-Wizard Tower or Acropolis of Heroes
4-Lake (1-3 Ordinary, 4 Boiling Flood, 5 Necrotic Ooze, 6 “River” of Light)
5-Building or Ruin
6-Mysterious Forest (1-2 Venom Thicket, 3 Abyssal Wood, 5 Fungus Forest, 5-6 Wildwood)
7-Forest
8-Hill (1-4 ordinary, 5-6 Scree Slope)
9-River (1-4 ordinary, 5 Raging Torrent, 6 River of Light)
10-Mysterious Marsh (1-3 ordinary, 4 Khemrian Quicksand, 5 Earthblood Mere, 6 Mist-wreathed Swamp)
11-Obstacle (1-3 Fence, 4-5 Wall, 6 Blazing Barricade)
12-Sinister Structure (1-2 Sinister Statue, 3-4 Banestone, 5-6 Charnel Pit)
BUT if I had a beautiful set of terrain pieces for this I'd have non-meta game reason to use it. Most people would be open to using this if I had all the terrain for it. Sadly, this is process is slowed down by me being pretty lazy. I got two fairly crude marshes/lakes, and a few serviceable trees and that is about it so far.