Would just promote more taking IMOI love this idea. Instead of slotting each team into a slot that has a certain percentage of winning the draft lottery, tie to the total number of losses. That way you don't have situations like the Knicks or Lakers last year where two extra wins drastically changed their percentage chance of winning the lottery.
http://fivethirtyeight.com/datalab/...posal-to-improve-the-nbas-draft-lottery/#fn-1