"Checkpoint Reached"
See, thats a good addition.
I've made a tremendous effort to mute people as soon as they start getting toxic. It's hard to do for me, and alot of others. I mute them, then see the enemy say something like
"Why are we reporting your jungler?" silence (because my teammates muted) "Ah ok, yeah I'll report Better Jungler for flaming"
I can see my opponent getting tricked into reporting me by my toxic teammate, and it's so hard not to unmute and defend myself.
I've been punished for that a few times in the past though, so I've just been really trying to mute all toxicity.
Seeing "Checkpoint Reached" shows me that the system is working, and I'm improving. It shows that im making progress in the right direction, and compels me to keep up the strategy im using.
Good addition Riot.