I'll admit I don't follow the NBA much until it gets to the smei-finals. I'm a college BB fan and tend to go right into baseball after it ends. I've never developed a favorite team in the NBA and the fact that former SU stars rarely become NBA stars and even the ones who do tend to play for bad teams dulls my interest.
Looking at Spoelstra's record, since LeBron left he's 390-329 in the regular season, .542, which is 44-38, exactly his record this year. That doesn't wave too many flags for the casual fan. He's made some post-season noise with a trip to the NBA Finals and to the conference finals. It's a record similar to the one JB used to defend his record over the last 9 years. He didn't really have a star quality player again until they got Butler.
But looking at his moves in this year's playoffs and realizing that keeping a pro sports job for 15 years is quite a feat, I've come to realize just how good he is.
en.wikipedia.org