I would really like to have this. Right now, when you lose a match (which may be out of everyone's control since PvP is so unbalanced), people who want to blow off steam just spam 'nice job' or 'good match' sarcastically. Bad feelings don't go away just because you don't give people an emote for it. I'd love if we could have something like 'let's do better next time'. It doesn't have to be toxic.