BMiller, while I understand the point you are trying to make, I'm not sure that either of these examples are applicable to the Kings.
With the Mavs, Cuban has allowed Dallas to go far over the luxury tax. If the Maloffs allowed Petrie to go over the tax we wouldn't even be having this conversation. We would have resigned Bonzi, still signed Salmons and traded our expiring contracts for a big ma or some other combination like that.
Second, they have had their franchise player for the last several years and have built around him like we did with Webber. However, we did not have a franchise player the last two seasons (even when Webber was here), now that we have Artest we might have one again, but it does take some time to build around him.
Finally, this was a very weak year as far as the top teams are concerned. While, the Mavs were able to go way over the salary cap to stay good, the Nash-Dirk-Finley Mavs would have moped the floor with this group.
With the Heat, the biggest reason not to follow their lead with player moves from last off season is that there's a good chance the won in spite of those moves, not because of them. Two years ago, the Heat likely would have beaten the Pistons if Wade had stayed healthy. This is particularly relavent because that Pistons team was much, much better than this year's team. They had a better coach, a deeper bench, were't worn out from starters playing too many minutes during the regular season, and Rasheed wasn't playing on a bum ankle.
So one year later the same Heat that nearly beat a very good Pistons team except for Wade's injury; beat a worse version of the Pistons as they are fully healthy, saw improvement from Haslem, and had Wade make the leap to superstar in his third season. Posey was a good addition, people knew this when the trade happened, the only question with him was if he could stay healthy. With the exception of JDub's crazy shooting game, the other new additions didn't make Miami better. Walker, Payton, and Williams really did not play well inthe playoffs and Miami nearly got knocked out in the first round. If they had brought back the exact same squad from last season, the Pistons' regression and Haslem and Wade's improvement would have been enough to carry the Heat.