Awesome image being made here. 

My 2 cents worth. 

Terrain is super and image has a very realistic quality.  If realism is what you are trying to achieve... one ship would work better, two maximum (possibly they could be sister ships)... with sails down one assumes they are at anchor.  If that is the case, the ships would be spread apart to allow for wind shifts swinging them around the anchor point.  Trying to add launches on the shore would be so tiny they would be unrecognizable and if they were scaled large enough to see on the shore they conflict the scale of the image total.  Does that make sense?

Increase the frequency of the water mat.

For fire light, add a radial light, place it at the shoreline, set fall-off to squared and play with intensity and colors.

These are just suggestions.  There are other ways to jive up the scene like experimenting with POV and such.