yes there are

i can't make him so op from the beginning .

yes he is training with piccolo like og story

i let go like the original story, even if let vega train gohan it's not now

yes it is he just have to reach expert level to fully unlock its potential

no it's gohan transformation(ultimate gohan) you can google it.

first i thinked that it's enough but i changed maybe it's more realistic now.

that power at the base form, without transformation, imagine if he transform.

it's just name for points you collect after the mc defeat someone

no i don't think so.

they can't control it in the first try.