Since Marin is a trinket but trinkets aren’t used in version 9 of battleground shouldn’t choosing Marin immediately give you a choice to be your hero power rather than wait until the 5th round?
Having to build what you roll into something that could work with a trinket roll is what Marin is all about. I find him to still be a powerful hero option. Orchestra with brann? win in any tribe.
I see your point of wanting to change him but for me that meta would be just another Finley.