For me it has to be boardwalk. You cant really take a map ment for 8 players and expect it to go well. Also because its a team slayer map its really easy to control power weapons because theres only the sniper and the plasma launcher. Which means one team is screwed because the other team ethier A: Has one or two of the power weapons. Or B:Has the left side of the map with the good holdout points on lockdown.
Not sure for me, however boardwalk in BTB doesn't really make much sense.