Brad made the roster flawed on purpose. Or kept it flawed on purpose. Most of us knew that rebounding would be a big problem. If we saw it, Brad definitely saw it, and so did Joe. That's why Joe was putting such a big emphasis on it during preseason. Despite the emphasis we just don't have the personnel. We lack quality bigs.
I hate to use "if only" because sports don't work like that. But "if only" PP and/or DWhite shoot at near their normal percentages from 3, we could conceivably be 2-1 despite the flaws in our roster. Both PP and White have been struggling shooting the ball. If this continues it's going to be very difficult to win games. Edit: Simmons too. Only 29% so far from 3. Small sample size, but perhaps coming off the bench isn't his strong suit.
No point in being impatient. Without Tatum, I see this as a lost season, at least in terms of competing for the end prize. If the roster is flawed, so be it. Brad is evaluating what moves to make every day. I see no reason to trade assets without meaningful return in a lost season, even if it improves the roster short term.