The '13 Heat tired themselves out in the regular season with that streak. They weren't even close to being that dominant in the postseason. The '12 Heat were like the '14 Spurs in that once they flipped the switch (Lebron's game vs the Celtics and the Spurs G7 vs the Mavs)--it was over.
And it was more like Ray Allen over Mike Miller--not James Jones. Allen supplanted Miller as their end of the game sharpshooter when they went to a PGless offense. Birdman was a big upgrade--but that's still just a depth move. Joel Anthony didn't close games in '12. Bosh did at center.
And I don't care at all about Dwyane Wade's offensive numbers at this point tbh. That's just a luxury. He played exceptional D during the '12 run. Defensively he wasn't anything special in '13--and was a s in '14. The Heat lost to the Spurs because of their horrible D, not because of any offensive deficiencies. So I'd much rather have a lockdown defender in '12 Wade and Shane Battier's better D in '12 over the difference between Miller/Allen and Birdman/Anthony. (And i guess Lebron's 3 point shooting)
As for the Mavs, that LA team they beat was a joke. That whole season was filled with
every time they'd up games. They were diverse compe ion in that they had 2 7 footers that could kinda score + Odom--yeah, but let's not act like they were the championship LA team or anything.
MVPau was playing like dog that postseason and it wasn't because of Chandler or Dirk. It was his
breakup with his girlfriend
tbh. He only averaged 13.5 ppg and 6.8 rpg on 41.8% shooting against the Hornets.
As for the Thunder and Heat, I think they're better wins from their name value than from the teams they actually were. What those Mavs did was prove you can't win a ring in this league anymore by playing ty iso-ball/relying on transition baskets in the playoffs. They forced the Heat to go all out in getting 3 point shooters that offseason so they wouldn't run into the same spacing issues again. (and it should go without saying that the 11' Heat and the 12/13/14 Heat aren't even in the same stratosphere in either offensive or defensive systems)
So I don't think they're a bad championship team or anything--but I think the offensive system improvements with the modern Heat/Spurs offenses would be too much for them to handle.