Plus there's the small overlooked feat of Gotenks blocking some attacks from a Copy Vegeta who was trying to kill him, when if Copy Vegeta was over twice as strong as him, trying to do that would literally result in his arms being torn off.
There's also the possibility that Gotenks is a lot weaker now. Super seems to work on the idea that your strength atrophies insanely fast without training, with the example of Gohan. But even ignoring that, it's been like five years since Buu, and the manga already established that no training for such a period would moderately decrease Goten/Trunks' strength. I dunno, we'll probably get more clarification next episode, or if Gohan's training ever actually ends up meaning anything. This is why I'm holding off on trying to specifically classify everyone at the moment because something will probably change my mind next week.
From an out of universe point of view though, I have to wonder why the heck they'd even contrive such a scenario where Vegeta is depowered and Goku is gone if everyone else is still completely worthless at anything but taking a beating. In previous arcs the others could at least fight the villain's weaker forms (e.g. Piccolo v 2nd form Freeza), but now if you're not Goku or Vegeta then even the villain's first form is too much for you. It makes you wonder why they even bother giving the villain a first form or, in the case of the tournament, "minions".
