The current situation with the Suns is a combination of several unfavorable events that played out over the season.
1. Vogel is supposed to be the def. minded coach but our new guys were below expectation defenders, from the 4 guys we shipped out before deadline, to Little and Bol and even Allen early in the season. Yet, he had to try out them with lots of court time to figur out that affected our defense and thus record, while our best perimeter defenders Okogie and Saben saw their play time sacrificed to accommodate it. They gradually learn to improve as a team, RO's entry was a huge boost, Saben got time, Allen and Bol improved greatly over time, Eubanks became more stable, even Booker occationally got the right covering position. So, the measured improvement follows Vogel's reputation more closely now.
2. On offense, they had to start with star iso's with so many newcomers, none of whom could reliably create for the team. Too much standing around watching ISOs also make players lethargic and lazy on D. And we also experimented with infamous labels like Book for PG etc. Again with RO's entry, discovery of Beal's, Allen's and to a lesser extent Saben's ability to handle the ball, and Bol's improvement, and Nurk's improved chemistry with particularly KD, we now are in position to minimize KD and Book isos, and to find out our true off. identity in the remaining 19 regular season games, assuming Book wouldn't ruin it upon his return.
All in all, there has been a lot of needed errors and trials over the season, we ought not only focus on the accumulated results of errors but not the improvement, in this sense, Go Suns!