Why not put these events in the Journey Guide so people who got lazy with their alts somehow missed the event can play it (and the rest can replay. Kind of a limited sandbox, if you will)?
I think it would generate some goodwill among the newer players so they don't feel like they missed out and have to farm chars from scratch in months when they become farmable. Could also incentivize some spending from those who want the char but wouldn't spend if they had to start from scratch.
Maybe End Game isn't for you