I agree. It will make the game more interesting to the fans as well. This game, as in other sports, is a TEAM sport and should be played as such. Get rid of the specialty player on the FO and let the man participate in the game until substituted for as any other player would be.
Leave the dive alone. As long as the player does not touch the crease or interfere with the goalie it should be allowed. This makes for more exciting lacrosse play.