Why are there only 10 Fighters in the Universal Tournament

[Nejishiki]

They changed Tenshinhan's line in DBS, didn't they? Well, Roshi did decent against them, Yamcha would had done much better. He's the third strongest Earthling.

Tenshinhan's comment about Yamcha is omitted from his dialogue, yes. Dragon Ball Super's anime continuity skipped citing a motive for his absence. Considering that in-universe, Yamcha's future remark is a bit strange now. I wonder why he felt the need to mock Tenshinhan?

I don't know if it's an inbetween, but the look on Gohan's face in that first pic makes it look like he's one of the few members of the Chiaotzu fan base and is very disappointed in Tenshinhan for not bringing him. It cracks me up

I intentionally paused the in-between there for that reason. It's a blink-and-you'll-miss-it frame.