2. Defensive struggles
As mentioned before, Tucker is only 6 ft 5 in. That should really be all the explaining there is.
Just based off height, this is a mismatch almost every time brings the ball down the court. The point guard can just easily throw it into the paint and let the big man use his size advantage on Tucker or whoever else plays the five.
When looking past obvious height mismatch and see the more technical skills required to play the positions, then you see even more mismatch.
Front court players work their whole life on footwork, going up strong to the rim, how to use their body to box out, drawing contact, and more.
The Rockets used to have Clint Capela, who was a shot blocking machine and would defend opposing big men with ease.
It will now be hard to defend big men without fouling.