I'm a DRose fan but we have to accept that there's no already spark in him. He is inconsistent for several seasons now and it's understandable. Feel sad for him that he ended up being traded for several teams. If there's a spark, then he won't be considered trading at all.
We cannot say that Derrick Rose has no spark already in him because he cannot move what he wants because the job of a player is to follow what the coach commands. Derrick Rose won't lose his own spark and maybe he is only in a team that is not very comfortable for himself. I think he can go all out when they have chemistry because even all-stars that have no team chemistry can easily be defeated by any weak team that has good chemistry.
If you really watch NBA you should accept the fact that DRose is done now. There's no impact or spark or what you are calling it. I'm his fan but I'm not blinded by the fact that he can't bring impact now for any team. Don't expect him to change a certain team, like New York because he is Derrick Rose, the youngest MVP in the league.
Let's accept that fact and move on. Chemistry is not enough to become a competitor in the NBA.