it will take a couple of live real games to get the fluidness of Westbrook and harden together.
Maybe, but its already enough if they can enter in the playoffs while their chemistry is improving.
If I remember correctly, when Kawhi played with the Raptors, chemistry was never a problem because he was able to make Toronto improve although they didn't finish as the number 1 rank, so its possible with the Rockets especially that these two have already played together with the OKC before.