Why don't we see rating changes in tournaments anymore ?

It was one of the best things about this site. Did you remove it or is this a bug ?

I would like to see this back as well. The rating change is used as a tiebreaker in tournaments, so it is nice to see how a potential tie might affect the standings.

I wouldn't call it "one of the best things about this site," but I certainly think it was nice to have. That said, I hope this does mean that the tiebreaker is changed to something more sensible like performance rating.

By the way, it seems like it was in fact intentional: github.com/ornicar/lila/commit/676d587697747c3f830a8537bee44a9a76821147.

Maybe the reason is that the high rated players might have gotten inflated ratings because of the amount of low rated players in tournaments and vice versa?

Performance rating is the tiebreaker now
github.com/ornicar/lila/blob/master/modules/tournament/src/main/Player.scala#L32

I don't see why removing the rating change is necessary. It was good to have, even if it doesn't affect the tie breaker anymore. Good to see how you play in the tournament rating wise.

Pre-tournament ratings (and thus, rating changes) aren't useful metrics.

Performance is now used as the tiebreaker. Rating diff is irrelevant and, as such, was removed, for the sake of simplifying the user interface.

It can only be a bug. For me, arenas lose their appeal without this feature. Even if I start the arena horribly, I try at least to end it without losing rating points. It means a battle against myself.

I generally set goals like "I'll get +25 in this tournament".
I also want to see how much points did my opponent gain and is he on very good form and something like that.