I'm not trying to nitpick on this but I think you're trying to have it both ways here. If you're not calling all of last year a tanking season, your point about this team playing worse loses validity. We are currently 2 - 8 against a fairly tough schedule. Last year, once we sat Chandler, we finished the season 2 - 12. Once we sat Booker, we finished the season 2 - 10. And those wins and losses came against a fairly easy schedule as several of our opponents were tanking.
Last 14 games of last season were:
@CHA, CLE, @UTA, GSW, DET, @CLE, @ORL, BOS, LA, @HOU, @GSW, SAC, NOH, GSW, @DAL.
This is not an easier schedule, it migth be the opposite, yet, our point differential was better in those 14 games than in these 10 games.
So, no, even with the blowouts, I don't think we are "obviously playing worse".
Obviously might be a slight exaggeration, but this is my perception.
IMO there is a complete lack of familiarity and comfort amongst the players this season. We didn't just add a new coaching staff and a new system and the players you mentioned. We also added 2 more rookies plus Crawford and Anderson. All told, that's an awful lot of change to absorb in a short amount of time. But I don't think any of us really know whether our playing woes are a failure on Koko's part or just the growing pains of a newly assembled team. To me though, we look like an expansion team.
I'm afraid that we have bigger issues than that.
Take a look on teams that the Hawks and the Nets have fielded last seasons. They did have less talent than this Suns team, and didn't really have more time to get comfortable with each other.
Yet, they played (much) more competitive basketball.
It's not about losing or having a record of 2-8. It is about the way of losing.