The way it works is that the king puts a random card facedown, chooses his role, passes to the left. P2 chooses (not blind), passes. P3 chooses, passes back to King.
2nd Role:
Then King, player 2, player 3 choose, and player 3 puts the last card face down.
So, this creates (as you’ve noticed) a serious problem in terms of making the King, the Assassin, and the Thief disproportionately powerful (even though choosing the King still gives you the crown if you are killed, and taking into account that a single role cannot be both killed and robbed in one turn).
For that I recommend the alternate rules that the game designer published on his website, in which you add the 9th role of Artist. That means player 3 gets to discard a role before the 2nd round of role choosing, and creates an element of uncertainty when it returns to the King.
The 2 player version is actually the most psychologically intense one in a “are you the kind of man who would put poison in his own cup or mine” kind of way. Again, the key mechanic is discarding roles: Random role face down, King chooses 1 role, passes WITHOUT discarding. Player 2 chooses role, discards 1 face down, pass back to King.
2nd Role:
King chooses role, discards 1 facedown, passes to P2. P2 chooses role, discards other face down.
Does that make more sense? Also, the best cheat sheet I’ve found for the game (that makes things a lot faster with new players) is having a photocopy with all of the role cards on it. They look at what they’ve been handed, they look at the sheet, they make their choice and do the process of elimination correctly instead of trying to remember all of the roles AND what was in their hand last time etc. Usually not needed by second game, but it’s nice to have.
Also, Dominant Species is a really long game the first time you play it, in my experience, going to nearly 5 hours sometimes. It gets a lot faster with just one or two experienced players, because there are a handful of key concepts that are hard to grasp and merit a lot of rules lookup while you try to sort them out. But once you have at least one person to easily say “Like this” when it comes up, you can actually play a game roughly proportional to the number of people playing.
In fact, I would almost say that it’s the kind of game that benefits from a partial “let’s do as much random stuff in each turn and suss out the rules” playthrough for an hour, and then letting it sink in before trying it again in a little while. It’s not hyper-cerebral or anything, but that way the first real play has everyone on more or less level ground with the opening turns.