Click he Impulse icon at the top left of Impulse, make sure show pre-release is checked. Update!
From my experience it seems.
1) People connect to lobbies much faster.
2) Connections between people in lobby seems flakier, but it'll still show green non-0 ping. It does generally seem to work, unless you're really not connected to a lot of people, in which case
3) You may still drop at the beginning of the game
4) Drops in-game seems to be gone now. The screen that shows up briefly in the past actually stays up and starts counting, presumably at 30s they get kicked. It's cumulative.
5) Favor seems to work more often now, but sometimes it'll still show up as 0.