I can genuinely say that I have never, at any point, had either a Chuck nor Frostclaw in water.
... however that is because there's not many POIs with a large water area and I RWG my worlds with fewer rivers and lakes- kinda because water is underdeveloped, so I'd usually prefer to not interact with it much because it's such a drag, maaaan. As with all things, because I'm not passionately invested in games or entertainment ever since reality betrayed my hype with Mechwarrior Online, if they improve it, genuinely sweet, if they don't, I'll live. Would certainly like there to be more to do with water - even just a dumb-basic dinghy as simple as Minecraft's - but it's not a deal-breaker or a camelian spine-snapper. I'd love moats and water as an effective form of defense, I'll live and enjoy the game without it.
Something I didn't see mentioned here regarding Chuckclaw's stone superpowers, though, is his ability to magically conjure boulders from nothing; I don't particularly care one way or the other about ladder-climbing animations (player-side, at least; zombie ones would be neat), but I had a ladders-involved funnel base I had to butcher into an aesthetic travesty in 2.3 because the Frostclaws would be halfway up the ladder and Conjure Rock eight blocks off the ground and hit me straight in the nose or mangle my very important electric fence mesh.
Reduced accuracy on the throw (all zombies are pinpoint long-distance snipers, it's weird) or some sort of 'on soft terrain'/+'not underwater' condition would be nice.