I'd say if it bothers you you should focus on choosing these cards out of the draft - you should be able to pick at least one of the three.
Obviously you can't do anything about his first pick but you can take it into account - I always assume the worst and plan my early game as if my opponent has a sneaky Syllas and my end game as if he has a sneaky Temporal boots.
Your opponent could, of course just have picked these up during the game but it seems unlikely for that to happen too often so that doesn't seem worth ruling against.
My sentiments exactly.
Also, Eeeville's solution is very clean and elegant, if you really feel bad with Boots - at some point I pondered changing the card to a familiar, a 'Temporal Bob' of sorts, but I guess there's no need to up the number of woodland critters for Kriss to murderize .