The Hawks haven't named a coach. Their existing players are nervous about signing until a coach has been named. By the time they name a coach, their imports will have walked. They're also likely to lose two of their starting Australians. On top of that, if they keep sticking to a budget, they won't be able to win any quality players to their club without overpaying for it.
As for the Pigs, they're a little up in the air too, have to start from scratch with their imports and may well lose their marquee guard. Their quality rookie will also be fielding offers from many clubs.
Meanwhile, the 36ers have locked up their star Australian, have picked up a reasonable guard that covers last season's deficiencies, retained a rookie who didn't really show too many flaws, and aren't sitting still on other options.