The Spurs didn't run it back this year. If you're talking about a complete overhaul of the roster, sure. But the Spurs completely revamped their offense from last year and inserted three new players to get major minutes. Pop was quoted in the beginning of the year saying, "We weren't winning last year, so we had to change it up." I have no doubt if this becomes an unsuccessful season, that there will definitely be changes in store. At the very minimum, it will be inserting 2-3 "new" players into the rotation next year. I say "new" because they could be on the roster now, i.e. Vassell swallowing DeMar's minutes and/ or Luka swallowing Gay's. These are both major changes already, IMO. And not to mention if those two get a full off-season of work, who knows what they will add to their game?
Bottomline: last year's unsuccessful season led to the "loss" of Bryn, Beli, LMA, Lyles and "gain" of more minutes for Lonnie, Keldon, Poeltl, Vassell. Expect something similar for next year if these losses continue.
*I still expect some of these changes even if it was successful because it's natural progression for the young talent, and maybe they're just following a strict timeline right now.
By the way, if you're wanting an overhaul of the roster, you're following the wrong team. That's just not what the Spurs do. Not to you Kev, but to everybody.