I have to say I think you're downplaying the awfulness of what happened and trying to give it a positive sounding spin. Jon said he may of spent a year with Jor-el. Jon then got sucked though a wormhole to Earth 3 where he was imprisoned and tortured inside a volcano by Ultraman for the next six-seven years before escaping. Now they don't specify how much time he spent in the volcano vs how much time wandering earth 3 in hiding before finally getting off, but he did not spend most of his time having adventures in space. "Space Prince" is hardly an accurate description.
Frankly, I find this completely terrible and the best case scenario I see is Jon was right about spending a year with Jor-el and they end up stopping the younger Jon from going back in time in the first place(Jon returned to the main universe three weeks since he first left home, so if he spent a year with Jor-el there would be plenty of time to stop this).