I wouldn't call Kale mid-tier, but other than that you got a point.
But then again, why didn't they match the fighters of similar levels to each other? I think it would've been far more interesting to see the earthlings handling and outwitting the U9 fighters who seem to be slightly stronger than them, than what we got with Goku and Vegeta eliminating them in one go.
Same goes for U10 who all just got dominated by much more stronger fighters, some of them off-screen even. I think things could've been more and interesting and tense this tournament if the opponents were on an equal footing most of the time, instead of one always dominating the other.
Yeah, I messed on Kale. She would fall under god-tier.
It's a battle royal, people are not going to magically pair themselves to match exactly their opponent. I mean, some times they do or try to, but most of the time you're kind of stuck who you run into. And U9 were the smart ones by all attacking in a group in using their teamwork. They they utterly screwed up was attack Goku and it went downhill for them.
U10 just got slowly picked off. Some did fight others of their level or try to, only to be knocked off by bad luck, overestimating themselves, or they got outplayed.
I do agree that it would be nice if there were more god-level people, but I honestly wasn't expecting it since Dragon Ball tournaments has mostly fodder with one or two powerhouses.