Thanks for the analysis, gives us a great basis for discussion. Between Preview #1 and #2 I see a HUGE red flag: fouls.
In Preview #1 you explained he is used to do what the NBA would call moving screens. He's been used to that for years and I don't how fast one can "unlearn" that, but I'd bet not overnight.
In Preview #2 you show us that he is consistently projected above 4.5 fouls per 40 minutes. He seems to be an aggressive defender around the basket.
I'm sure Pop is coming in with the best intentions re: a guy who is getting paid around $5 million and has a proven history overseas, so my comparison doesn't fully apply, but think of the last big man prospect we had and what happened to him because he racked up a few fouls, especially on moving screens. Now think about the next big guy prospect we had who also got his minutes limited because of fouling and aggressivity (one might call that passion) in his rookie year.
In short:
Pop + big man prospect likely to be a foul machine at first = FAIL
If Splitter fouls as much as your reports indicate, his PT will be ~10 minutes by December.