This is like a far more wallable version of Four Lakes but without safe ponds.
Perhaps Budapest comes closest, although no 2tc start and again no safe ponds.
As for playability, I think you shouldn’t go past 2v2.
Ponds are so important that 3v3 turns into everyone fighting in a pond and 4v4 probably has 3 pond fights with one FC player, possibly Vikings for Longboats.
On 2v2, though, it’s hard to contest all ponds.
If you do, then losing even just one might not give you enough time to deny raids from the enemy player that invested less into water.
That might actually lead to a diverse meta.