We must have been watching in different universes. In mine, his 2pt (48 to 41) and 3pt (36 to 34) percent both declined from his 1st year to his last . Rebounds and Assists went up about 1 per 40 minutes. His FT shooting improved markedly, but at less than 3 attempts per game, even the 30% increase he got amounts to less than 1 point a game.
But the numbers don't tell the whole story - he shot more 3s and fewer 2s his final year, so the overall decline in shooting percent from 1st
In any event, I was hoping he would move on after his 2nd season - not so much because of him, but more because I wanted the minutes to go to the younger guys, who had the potential to be around several years. As it turned out, Purvis got a lot of minutes, didn't end up doing much with them, and somebody didn't get as much playing time or as much of a role on the team.