Amex plat has some travel protections now, e.g.: https://www.americanexpress.com/us/c...rip-delay.html

I don't believe seat selection/travel protection/etc is sufficient for Chase coverage; I think it has to be part of the ticket. You could try to change a segment in a fashion that increases the fees (overnight in HEL might do it?) and then charge the difference to Chase if you want that coverage.