I can only think of a few minor things I'd change about the ending itself.
But that's only the ending. If I had the opportunity to change significant portions of Season 6 to get a better ending, I would. But I feel like the ending's mostly the best we could get with what a crap season led up to it.
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"And the theoretical maximum is 2880 messages, so I was only performing at 45.94% posting efficiency." - Luster Soldier