Of course I've been up all night! Not because of caffeine, it was insomnia. I couldn't stop thinking about coffee.
What happen if when at the same time, there are two players both activate "Pawn" icon in their Studios, how to decide who will take the Assistant pawn?
People do not activate things simultaneously, you may be doing that to save time, but technically things happen in order. When you claim cards you do your actions immediately. So if multiple people have the pawn icon whoever claimed their cards last will end up with the assistant.