I will say these things just to say them:
1 - Locke mentioned at some point in the offseason that he didn't think the idea of keeping a team together just because they were close was a good idea because every season is simply different. What may be true one year with something so delicate as on and off court chemistry is basically certain to change just because change is the constant in existence.
2 - Most teams get better over an offseason, so the question of improving a record is a question of how much better you got than other teams got better. Considering that, standing pat makes you worse. Keeping the roster virtually identical was a mistake and I felt that way heading into the offseason, during it, and coming out of it. I am not saying the team needs to be blown up, but when you take the fairy dust of last season's surge away, this roster seriously lacks stars and spacing, and this team's two franchise players either thrive (Mitchell) or simply require (Gobert) space to be their best.
Pursuing star free agents was already a bit of a fringe notion, but if things keep going the way they are, the idea should basically be abandoned altogether.