We'd have to get beaches first. Right now all the shores are the same every-other-square jagged edge.
If you also had the water change to a lighter color as it neared the shore, that would make it look better also.
Watching kids play Nintendo 64 the other day, some type of fighting on an airplane that looked like it was made of concrete.....as it was cruising along, I noticed that the water and shore effects looked much more "realistic" than they do in AHII.
Although, IIRC, it sems that HT said something previously about the shores being that way now because they will be adding beaches or some type of shorline later on - but I maight be mistaken.