What this could do to warfare and strategy is huge, as well as hopefully help give some leverage against those nations conveniently tucked along the coast with only ocean on 3 sides.
Suville, OI, Caergoth, D'Hara, and Riombara will be effected a lot by this change... Can't decide if it will be for better or worse though for those realms.
But I agree. Tactically, this is huge. Perhaps the biggest tactical change I have ever experienced(and I am a 5 and a half year member).
Assuming there's a city with a harbor on the lake, right?
Yes.
