Yeah - land nations do really well raiding R'lyeh, and other clammers who are smart enough to stay behind walls. Besides - it isn't necessarily that easy to see who is or is not clamming.
Note that I didn't read where RonD said clamming was "overpowered or broken" - just that he abhored it. Personally I'd hope to see big old battles in this game - what good are clams and astral given VD research making Wish almost unattainable? The clams probably
will be needed to take down the Mother Oak and other gem income spells though.
