We were -14 in 6 minutes with Tillman playing with the starters. The rest of the game we were +18. I don't know what is going on with Tillman but until it is figured out, he shouldn't be playing. Now that -14 was not all his fault. He was 0-3 (all 3PA) with the rest of the team being 1 for 7 and 0 for 2 from 3. They were essentially leaving him all alone and doubling everywhere else.
Overall, I think we are seeing an impact from not having Brown (and Porzingis). White, Holiday, and Hauser were a combined 3 for 20 from 3 (that is 15%). The efficiency for these guys goes way down when Tatum is the only real creator. The shots they are taking are more difficult. They double Tatum, and someone else has to create.
As others have said, they grinded out a win, which is great, but the team is not playing well. Not having Porzingis is kind of accounted for, but with Brown out, you still need to find about 25 pts/gm from someone (in addition to what you are losing for not having Porzingis). It is clear that the team is having trouble finding those points. When Kornet or Queta is on the court in place of Porzingis, you get away with it because of all the other scoring that is usually on the floor. Now without Brown, we need even more from Holiday and White and others and it just isn't there. This would be true of any team that was missing 2 of their top 3 players.