0-2 for Doc Rivers so far as new head coach of the Bucks. it seems like the meme's that was seen online about Lillard saying "how can they win a championship" with Doc... 
I hope this problem will nnot get worse and Bucks will not regret on their decision firing Griffin.
Remember how people look at James Harden trade when the Clippers lost 5 straight games since he joined the team? They looked at the Clippers like they're just an average team that has all-star players that isn't fit to play with one team. Now look where they at currently. I hope this problem will nnot get worse and Bucks will not regret on their decision firing Griffin. I believe it's the same with the Bucks. Chemistry will be affected, and so does the playstyle because each coach has a unique way of coaching their team. As for Doc Rivers, 2 games isn't enough for him to be judged. Though the defense really of the Bucks suck this season, it's the fault of their old coach, but I believe that the team will be better. Just give them some games I think. Like 10 games, and from there, let's decide as fans whether the acquisition of a new coach helped them or not.
I think even 10 games may not be enough to draw any conclusions about this, as the Bucks players and their new coach will probably need more time to find a mutual understanding between them. I think the main thing is for them to have good team chemistry by the time the playoffs start. The Bucks management clearly expects their team to succeed in the playoffs with Doc as head coach. Otherwise, firing Griffin will seem pointless.