Griffin is not used to his maximum potential, him freezing up has more to do with being used as solely a finisher than it does the limitations of his game. Again, we saw what he can look like offensively when Paul is out, and he goes on huge tears, it has happened over and over again where Griffin looked better playing with Darren Collison than he ever looks with Paul. He is a playmaking PF that has been reduced to being simply a finisher, a dude that had to expand his game to shooting mid-range jumpers & threes to accommodate CP3. That's nothing but excuses for Paul, what about his choke vs the Thunder in game 5? Blake showed up for that series, and CP3 let them down, he got abused by an overrated SG like Westbrook. Blake has choked no doubt, but he was younger and since then he's played well, maybe if he was allowed to play his game he'd look better, but we know that's not going to happen as long as number 3 is his teammate.
Kyrie was on an upward trajectory before LeBron got there, you make it sound like he had been in the league for a decade, he was going into his 4th year when LeBron returned. I have no doubt in my mind a Kyrie/Blake pairing would be more successful because that is exactly the type of player Blake grew up playing with, and it's exactly the type of player his game is built to fit with. Seriously, what is the explanation for Blake playing better with Collison?