We haven't tried the game with a lion in it. I suggest that if we do that, it would go in the square directly in front of the ramshead soldier. The demoted side would be a Kirin, which would be able to jump two squares forward and two squares backward. The lion would be limited to the igui move, or two squares either forward or backwards, capturing twice. In other words, it would be able to move twice with one square per move. Jumping over a piece to the square just beyond it would count as two moves.

That's pretty much what I suggested earlier, except that I would allow the igui move and have a kirin as the demoted value of the lion, rather than a silver general.

I do think the lion should be as limited as I described, because I really don't think it should be far more powerful than other pieces since the game tends to revolve around it too much in that case. It would still be one of the most powerful, if not the most powerful, piece on the board, but it wouldn't take over the game.