Two things:
1) James will never play under 30 minutes a night. Of course his minutes will go down when blowing out opponent after opponent, but he won't average under 35 minutes. Just won't happen...
2) While I like the idea of playing small ball at times, it shouldn't be our usual "go-to-lineup" in crunch time and it certainly shouldn't be our "standard", let alone starting line up.
While it's clear that Love will be the centerpiece of our bigs on offense, it really shouldn't be the same on defense. I don't like the approach of trying to play more small ball because our center rotation doesn't allow otherwise. Yes, it worked in parts for the Heat, but still, their biggest weakness remained their center spot and it ultimately was one of the main reasons, why the Heat had such problems it's last two seasons. Their philosophy of playing small ball was more born of necessity than anything else.
I can't see James playing a lot as our power forward and I think he also doesn't want to spend too many minutes as our 4.
It was one of the reasons he left Miami. Their forward position (Battier/Lewis/Beasly/Haslem) was a complete joke and it was one of Miami's biggest flaws LeBron had to cover.
So getting a solid back up center should remain our top priority.