Credit to you for at least offering a solution
I am not sure if you are talking about the actual standings or the draft order. If you are talking about draft order it is a little complicated, and simpler is usually better. If you are talking about the standings then it is a full stop no because you are saying a win in October is worth a different amount than April. I am not sure if you were saying that however.
One idea I always liked is counting the points that a team gets once it is mathematically eliminated, which is another complicated concept. Basically at the end of the season you would look at what point each team was mathematically eliminated from the playoffs and all points they accrued at that point would count towards their total and the team with the most points would pick the highest. Teams that were right on the bubble might have been eliminated with 1 or 2 games left in the season would not get enough to jump to the top of the list, but teams that sucked all year long would actually have to try to compete to the bitter end to get points towards that draft pick. It would reduce the trade deadline to an even more boring spectacle than it has already become because there would be less rentals because even the poor teams would want to be competitive to get a better draft pick. I am not sure if rentals actually provide any benefit to the league as it is, they rarely factor into anything significant.
All that said, the simplest solution is usually the best one. If you are explaining, you are losing the argument.