I believe the constellation is about 90-95% complete now. The first shell at least. There's plans for more shells but that's for redundancy, not coverage.
I think the laser interlinks are proving more difficult than SpaceX anticipated. I had expected them much earlier in the deployment than now, and it seems they are currently only planning them for polar orbits.
I think they need quite a lot of satellites in polar orbits to get coverage at the poles, and they have barely launched any yet. They are close to 100% coverage of the rest of the world already though.
Well, 9/10 is still a fraction, just not as small as I thought it was. ;-) I must have fallen behind on launches, not realizing they were this far along.