Thus would have no affect on tanking or even make it worse
You think teams are tanking for second round picks? Seriously?
No, but I think it would help alleviate the hopelessness of finishing 10th-14th. To a small degree yes, but like I said it is just one small incentive.
Your system actually increases the difference in probability between picks, increasing the incentive to tank.
Disagree fine. But bold is just 100% false
Currently the worst team has a 25% chance and the 8th has a 2.8% chance. This way The worst would have a 16% chance and the *8th would have a 7% chance.
To illustrate how it would help I will use Philli as an example. Half way through the season they had a fire sale. They managed to chase down a 19.9% lotto chance and guaranteed top 5 pick. Under my proposal they would have secured only a 12% chance and a guaranteed top 9.
Let's say they behaved differently ,managed to improve their team before the deadline, and finished with 26 wins behind Bucks,Magic,Celtics and Jazz. Currently they would have forfeited a 19.9% for an 8.8% . Under my proposal they would have dropped from 12% to 7%.
And by splitting by conference you just create a race to the bottom by conference instead of by league. How does this help?
This is a fair concern but...
Each year there are 10-11 teams that have a legit shot at the playoffs, these teams don't tank, that leaves 4-5 tank candidates in each conference. My way gives the bottom four teams in each conf. a fair chance of getting a high lotto(1-4) or a mid one (5-10). Their chances: 16,16,12,12,10,10,7,7 for seven spots.