I love Tatjana the way she is. But true, her refusal to act as a sub is her only flaw. Perhaps we should work a bit more on her pride, calling her a coward.

With Amanda it worked.
I also love the rivalry theme. Lyen coming back and spraying gleefully saltwater on Tatjana's welts caused by Ariel, what a great idea.
Actually since COP Duo 16 months ago I am dreaming of a comeback of Lying once again falling victim to Tatjana's sadism.
But the other way around would also be thrilling no end. Ah, we are allowed to dream...