See, I knew I was going to be in SO much trouble.
The conversion of the land/water boundary is much much better!
Not saying you should but IF you were to move the water, the water would move 1/8 mile west and 1/8 mile south. (4 pixel offset)
The Manual Beach Tool sill works as it did.
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I used the same terrain as before for testing, a jpg of the mouth of the Seine, sector 2,4, keypad 4 is attached.
When using Spline All Islands on this complicated terrain, it becomes completely lost in some areas with the purple(?) linking lines much more intrusive then before.
I don't remember this particular problem in patch 13 but that one may have been better. Most of the splined English coastlines have been lost while most of the French coast is still splined as before.
In this iteration, with the much more accurate conversion of AH2 terrains, I would stay with manual beaches for historical terrains and probably cut off any square corners of the land. Some of the rounded beach portions are incredibly close. Manual beach smoothing would be close enough that most people would accept any anomalies.