So I just finished OST and I have a few things I'm unclear on, and was hoping some of you guys could help.

What or who did Tayschrenn become at the end? Is he the new D'rek?

Was the identity of the Tyrant ever revealed? Did I just miss it? Or was he really some ancient, faceless evil?

When did K'rul become a woman?

Who was the T'lann Imass in the Finnest House with Raest? I think he's from MBotF but I don't remember exactly who it is...

What did Barathol and Humble Measure make? A coffin for the tyrant I assume, but scarce details were given.

Why did Vorcan chain herself up?

And finally, does this take place during or after TCG? References to the Shattered God and his cult are made, as well as the Green Banner, but wasn't the Crippled God released to his followers at the end of TCG?

A lot of questions I know, but any elucidation would be appreciated.