People fail to realize that Splitter is a significantly better defender than Pao is, heck, even better than Timmy for that matter. Tiago shows on the pick n' roll and gets back, and his one-on-one post defense is superb...far better than Pao's at this stage of his career.
Pop didn't go away from Tiago because he was playing poorly, he did it because Ibaka had no back to the basket game, and Bosh is a soft player who would rather shoot outside than grind on the low block.
How many games did Pao miss due to knee problems last year? You want to rely that heavily on him?
I would like to have Pao on the team, but he isn't going to sign a one year deal at this stage of his career, so mle is the only chance, and it is doubtful he would go for that, unless he simply wants another ring, or a chance to piss the Lakers off for all treating him like garbage.