We need to master the arts anyways for the insights and the whole system always requires re-building arts again and again anyway. The only real difference consolidating in G8 instead of starting in G7 is that all G8 art creation can get influenced by the Name/Word we pick
Still don't see the need to re-Successor several of our Successors Arts at G8. In fact, it seems like the worst possible time to do so.
Let's see the broad strokes of what we need to do on our cultivation.
We are going to master our pending arts and get Insights from them, though maybe not from
all of them. I include SSC because, while Argent Genesis was purely technical, SSC does have lessons to impart. We'll likely choose an Insight about what it means to be a Songseeker for Ling Qi.
Then we'll craft several Successor Arts, the ones I mentioned in my previous post, and master them; gaining even more Insights. We'll also pick up another Advanced Insight from a tribulation along the way.
At G7 the only important requirement is to complete the Name Quest (we have a full stage of advantage on Concepts, we are obviously going to have 60 or almost so by then). With the Insights of the original Arts and their Successors, we'll likely have around 15 Insights out of 17 slots.
So it's a debate of how much we are willing to delay getting to G8, and subsequently Cyan, in order to have a completly filled Name instead of an almost filled one. I have no idea about Name choosing mechanics or consequences, so I can't argue any one way.
But once we have reached G8, there isn't simply anything* else to do but work towards breakingthrough to Cyan. The only thing I can think of is filling the new two Insight slots, but I'm not sure if that brings any benefit before breakthrough as the Name has already been granted and so they can't be part of it anyway. If there is no mechanical difference, short or long term, I certainly wouldn't delay breakthrough to fill them. If we fill them up naturally? Sure, that's great. If not, we can fill them with the Arts we craft at Cyan.
*There is helping Suyin make the breakthrough drug, but that's a sidequest, not cultivation.
It's also pretty cyclical. The Name comes from the Insights which comes from mastered Successors Arts. So we don't need to make Successors Arts v2 based on the Name we get, because the first Successors Arts are already part of the Name.
You also speaks of some Successors Arts falling behing on potency once we are at G8, which is true enough. But that's also why it's a terrible idea to re-successor our arts then. Because they are going to become obsolete again as soon as we breakthrough to Cyan.
Once we achieve the 4th realm, we'll have stablished our Law and gained access to Shen. Shen is a completely different dimension from Qi. Any Art that doesn't employ Shen is going to rapidly fall behind once Shen starts consistently getting used in fights.
So once we are Cyan we'll
have to reforge all of our arts to tap into our Law and employ Shen. Which is why making a full coherent suite at G8 is a complete waste of time.
That's the first task of a newly minted Cyan cultivator.