Having the "Three More Hours" feature implemented wouldn't effect the strategy of putting your highest bid in. You could still win with proxy bidding the same

Having the "Three More Hours" feature implemented wouldn't effect the strategy of putting your highest bid in. You could still win with proxy bidding the same way you always have been able to before. All the feature would do would kill the last-minute folks. Nothing more, nothing less. All of the "bid and forget it" folks (i envy your discipline) still win if you value it more than the next guy.