A big 3 isn't the same as a "superteam" though. The picture of the Heat of that era was a superteam. It depends on your personnel. Right now the best teams, or the contenders have one thing in common, a pretty clear designation of at least 2-3 players controlling the majority of their teams shot attempts. You don't see Jaylen Brown averaging nearly the same amount of shots per game as any players behind him. It's Tatum and Brown and then everybody else. The Bucks are a little more varied but that's partly because Giannis usually has such a high usage but it's still going to be Giannis, Holiday, and Middleton (prior to Middleton getting injured). This is why it's going to be interesting to see how Mike Brown starts prepping for the playoffs because as time has gone on Fox has seen an uptick in ball domination and at times so has Domas. Maybe this team will ultimately be completely one of a kind and yes, shooting trumping everything these last couple of playoffs does give hope, but in the playoffs having someone like Sabonis being one of your stars hovering around the same attempts as players like Huerter, Monk, Barnes, and Murray means you're probably doing what the defense wants you to and now it's up to players down your roster to basically not miss because they are only going to have 9-10 attempts per game which makes it all that much more difficult go on a tear.
That said with the new look Suns, a big 3 or maybe even a superteam just formed and once that happens the rules change. This little era of semi parity because the Nets were such a ****show may be over.