Don't see how the cluster jewel changes benefit the top players. Cluster jewels with sockets as a mod were nigh unusable unless you fed insane amounts of currency into them. Two sockets guaranteed means they're usable without needing a level 75 one. The base item now is very easy to get; you just need 4 or 8 socket jewels and don't need ilvl outside of targeting specific notables. Raw power of perfect jewels is higher - that's not bad, you'lll get maybe 30 life out of such a perfect jewel.
Already have a Fire cluster with good enough notables. Just need to work out how to get the third notable, and how to turn my Medium jewels into good jewels.