Maybe

Idea 1

To keep a bit the "spirit" of Sailfish, and to keep it consistent with your patch, I would evaluate a bit of blur around the disk.

Something like a disk which is plain in its center and vanishes when moving from the center to the exterior of the disk. Exactly as it is right now on Sailfish but without the glass effect.

Idea 2

Keep a plain disk for the current "page" and empty disks for the left ones (just draw the border of the disk).

I run the Snow White ambience whose 2 colors are White and Blue, maybe the blue (so the 2nd color of the ambience) would be better, just something to try.