Those stats (which are generally very good, but not perfect) over-value defensive rebounding, which is why Andre rated so well last year despite being – as you correctly put it – a lazy & mediocre defender.
However, I agree with your assessment from early this year: He's been much better. He's more active and engaged, and is using his athleticism better to cut down angles, especially when hedging. He was absolutely crucial in that win over the Dubs last night.
Anyway, it's great to have five Huskies playing great ball to start the year. Shabazz hasn't gotten as much love in this thread yet but he's shooting the lights out and has earned a nice role as Portland's 9th or 10th man. Dude's gonna have a decade-long NBA career and add real value – not a Kemba-type star by any stretch, but the type of guy who can help make a team better through the grind of the regular season.