I think the difference between Finn meeting Martin for the first time and him meeting Minerva for the first time is really important. When he meets his dad he’s so desperate to get him to stay, to finally have some bit of his past that he literally loses his arm in the process. When he meets Minerva he’s happy, of course, to meet his mom but when she tries to keep him from going home the tables turn. Suddenly he’s the one trying to leave, even though he has the opportunity to stay with the woman who gave birth to him he’s waited 16 years to know.
I can’t imagine season 5 or 6 Finn being so ready to leave like that, it really shows how much he’s grown since then. He doesn’t need to know where he came from to know who he is. He’s Finn Mertens, hero of OOO, and he’ll take his home with all his mutant friends over his birthplace with all his kin any day.
AT season 8 starts Monday Jan 23 with a whole week of new episodes (Two-parter Monday at 7:30pm and Tues-Fri at 7:45pm). Islands premieres the following Monday Jan 30 to Thursday Feb 2 (7:30pm, 2 episodes each night)