Rating change visible only after game is ended. It would be nice if players may see it always (and before the first move).
Yes, because knowing opponent's rating, having a clock, and potentially being spectated by random strangers aren't all pressure enough for someone playing a simple game, we need to know exactly how much of our rating hinges in the balance to create even more psychological distractions. Can't we just play chess? hahah
Obscurity create pressure even more.