Does the foredeck/castle seem to cry out for a shielded swivel gun? Seems to to me.
On to a HUGE YMMV comment, the skif doesn't seem nimble enough to use a spar torpedo, though that's just a visual impression. On the other hand, an element of marines volleying from the side means it doubles as an assault/boarding craft.
Agreed on the propeller disks; I'm wondering if streaks of plastic glue might have a similar effect.
Thanks!
Doug