I'm no Tony apologist - and I definitely think he's got to continue to adapt - but he really DID try to adjust his game last year. He had the lowest usage % since 2003-2004. And before anyone says that's simply due to the emergence of Kawhi, remember that that period includes prime Manu and Tim years. He also attempted 20 more 3pt shots than any other year of his career, and shot 5 percentage points better from there than he ever had.
It may not be as quickly as we want, and he may not be where he needs to be, but its pretty clear he's trying to adapt his game, successfully or not.