It just seems to me that this is a plan that leads to Nelson sitting on the bench a lot, since (to my knowledge at least) he only plays PG. I don't hate the idea of Shulga starting at PG and Zeb at SG, but that could lead to Nelson only getting 10 minutes per game, while Shulga or Zeb play all 40 minutes. If Nelson starts at PG and Shulga at SG, then Zeb can spell each of them, leading to all three getting 20-30 minutes.
Obviously no one is guaranteed minutes, and maybe Odom has determined that Shulga is just THAT MUCH BETTER than Nelson.