(I wanted to post this over at the linked site, but there are too many hoops to jump through so I'll post it here.)

Also interesting is the line of craters (I see 5) running from mid-left through the hexagonal crater.

The first two are to the upper left of the hex, the third is on the left ridge, fourth is in the hex and fifth is on the lower right ridge.

My guess is that they were caused by an incoming meteor that was broken up by Saturn's tidal effect, but impacted on the satellite. A rare sight, indeed!