I've got no problems w/ the Event Tokens themselves. My reward for leveling the characters was newly leveled characters. I get play out of them (and now even more w/ Omi's improving their usability). This isn't intended to be a dig at CG at all.
I'm just trying to illustrate a case of serious "feelsbad". Literally everything else can stay the same, just only take my tokens if I win. I'm on GL 6/6, this isn't going to be a big issue for me going forward, but it's a small "token" (lulz) of appreciation to your player base.
The challenges themselves are extremely easy, it's not like legitimate failure occurs frequently.