I would try and test the diminishing returns to start. I did this a while ago, but they have slowed down/adjusted sense then. Try 40/40 in IQ for a little and see how much faster it goes up, and see if skills drop off. My last experience was that it shot up way to fast and there was no drop off, but that was when potential as a whole was shooting up to fast.
I would also test IQ - mainy in zone. It seems like this set you can run at F and have great results. With press and m2m it seems fine, but press/zone combo even seems out of whack with the results.
With the changes to player developement I would compare the high pot reb guards and high pot per bigs and see if there are really more. I'd also test and see if these per rated bigs can really make an impact. Right now, it don't seem like bigs can really hit outside shots.
One more for now would be to focus in on ast/to. I feel like they are off when it comes to the results. Passing bigs don't make the impact they should, and there isn't much of a drop off between guards with 30 bh/pass and 80 when it comes to stats. Stats could be purely cosmetic, but it gets annoying always seeing 3.something ast to 2.0 TO rating on all my guards regardless of there ratings.