Hearthpwn

What do you think about Tamsin Roame for more removal and generally soul fragment shuffles?

Oh I thought I replied to this already, guess it didn't go through?
Yes you are correct that Tamsin Roame is a great fit for the deck, the list you saw was put together before all the Forged in the Barrens cards were revealed. 

Well, it could work. But I'd recommend either taking out Willow or taking out the spirit jailers and the void drinkers.

She has a bit of anti-synergy with Tickatus, too, since you really want him to be played for the battlecry once corrupted.

I mean, there's still the whole expansion of cards to consider as well, once they finally reveal them, but I think control warlock will definitely be a thing this season. :)

While you are correct that Willow has anti-synergy with Tickatus, I was thinking you would use Willow as tempo against certain decks, or in situations where Tickatus is near the bottom of your deck and wouldn't be drawn in time anyways. You can also gamble playing Willow to corrupt Tickatus if you happen to have no other 7 mana or higher cards in your hand. Worst case: you get a 5/5 body, 8/8 body and a taunt out in play.

The Void Drinkers are there for constancy with Willow and synergy with Soul Shards.