In my opinion, good game play is determined by if the player is still in the game.
The Brigade has good game play as they are still in the house.
Kathy and Britney have good game play as they are still in the house.
Their styles are different but I am not going to say that one's game play is good and other are bad, IF THEY ARE STILL IN THE GAME.
It comes down to making it to the end....whatever style gets a player to the end is by definition, good game play.
Jordan was not a mover or a shaker, and she won last year...many thought she floated but she would.
My all-time favorite, Janey, was a real POV queen, but she never won.
Evil Dick was, well, a dick and he won.
If the goal is to win, then judge good game play by that.
In my opinion.