This game has extremely small lock delay, the time it takes for the block to lock when it is touching the surface. It is my opinion that increasing the lock delay time will make versus matches more skill based. I often times misdrop from the block locking too soon and die instead of topping out from overpowered garbage. Intentional Efficient play near the top is virtually impossible because a player can't simply stop and think for a moment (even without incoming garbage).
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I agree strongly with your suggestion, it will also make the game more (tetris like) and attract more tetris players.