Due to their contracts, the market (NBA executives and media) has soured on Westbrook and Wall. The market devalued Chris Paul in similar fashion by magnifying his contract/age/weaknesses and he rebounded after one solid season. OKC turned Paul into 2 1sts and a pick swap (via Oubre/Rubio).
Westbrook and, especially, Wall are one solid season away from rebounding in value as well.
As the Jrue Holiday market proved this offseason (and the George/Westbrook/Davis trades before it), contending teams are willing to trade future 1sts and pick swaps for good players (except Jrue has never been an All-NBA player).
Whether it’s this season or next, if Wall plays in 80-90% of Rockets games and averages 18/4/8 with slightly above career average efficiency, the tenor of him as a player will change. And if the Nuggets/Mavericks/Jazz/Clippers are ousted earlier than expected (their internal expectations, not yours), they will consider moving their assets for Westbrook/Wall.