I hope I can shed some light on this a bit.
As some of you are aware I have irregular dialogue with Patty from time to time. What you need to keep in mind with Mills is 3 things.
1. Patty attacks everything with a bit between his teeth, from his morning cornflakes to 2nd quarter three point attempts, he has one gear, flat out. He is acutely aware that his opportunity to become the permanent back up is his to own, and this year, thats his goal, he wants it badly, so it probably provides him a propensity to force things a little, Pop and BB are well ware of this, hence Pop is frequently working with him to not force things and let things come to him, most will note his more "constrained" offensive approach he has adpoted the last few months with the message facilitate dont try and dictate. FO are well aware that Patty has the tools to drive a game off his own hand. His speed with the ball in his hands has few rivals in the league and when on his ability to create his own shot with that speed is going to be a handful for any leagues second unit, but he needs to work on his all around game. Patty knows consistant offence will help his cause in gaining more minutes, particularly if he can score at a higher clip than Neal, and there are a couple of guys in the team that really want him to succeed so much so that he will be feed the ball quite a lot on O but again, the passing which he has been working on will help his cause further. His D has come on leaps and bounds since he crossed from Portland.
2. The Spurs plan for him is long term, his plan long term is to work his way into being TP's unquestionable backup and then take over one Tony hangs up his boots, he loves the Spurs and is a fiercely loyal person, so he would be happy to work on a fairly low (by NBA standards) wage to stay.
3. People forget how young he is, he left college after his Sop re year, played 2 years at Portland with little guidance and landed with us late last season. Its hard because he had logged so much playing time in the worlds eye, pin up for SMC, all the international stuff, Olympics etc, a successful stint in China that people thing he has been around for longer, when in retrospect he is only in his 2nd year out of college in effective years. Personally I thought he should have returned to SMC as a junior after he broke his hand. His Olympic showing and his game against Steph Curry in post season play had many believing he could go first round that year in a year full of point guard options. But hey I cant complain, going the long way around he ended up on my fav team. I think he is worth the development long term. I really which more teams in the nba would look at roster spots 13/14/15 as long term. I do think though Patty should be in the 10 right now.