As far as I'm aware, there hasn't been any issues after the server side fix that was rolled out on the 18th.
As for certain friends not showing up in the Rift, I'll need to check with the production team but it may very well be a design choice where only a small subset of friends show up per instance in order to reduce server load and client load times. After all, there is a difference between parsing 350 friends vs. 10 friends at a time.
Also, bear in mind friend pawns won't show up in the Rift if he/she has never rested at the Inn. As you may be aware, pawns are uploaded to the Rift when players rest at the Inn
and while they're in Online Mode.
If the above scenario doesn't apply and you believe there's an actual problem, could you please log the issue on the official
Steam bug reporting thread?