Back to Oladipo and why we shouldn't be expecting a repeat: In terms of improvement from year to year in player win percentage, the per-minute component of WARP, Oladipo is not only the most improved player this season but one of the most improved players in modern NBA history.
Because Oladipo had rated somewhat better in Orlando, posting a .525 player win percentage in 2015-16 before being traded to Oklahoma City, some bounceback was to be expected. Still, the nature of his development is extraordinary.
My SCHOENE player projection system tries to account for variance by looking at how much the 50 most similar players at the same age improved from their baseline (performance over the previous three seasons, adjusted for age and regression to the mean) and applying it to the player's baseline performance. The best projection this yielded for Oladipo this season was a .609 player win percentage. He's beating that by nearly 40 points.