The windflow displays show that Zeta still has an oval or teardrop shape. IOW, full, circular cyclonic flow hasn't yet developed. "Earth" shows the teardrop clearly...
... and "Windy" shows Zeta as an oval at the surface, and poorly developed at higher altitudes.
https://www.windy.com/?23.342,-91.121,6
And neither shows the entire-Gulf CCW circulation that we saw with Delta.
Temps are also lower -- so, perhaps, Zeta will have less energy available for hurricane development...
TXnMA