Done with the main series and the ending was so disappointing. Felt like they tried to cram everything together and knot all the lose ties.
They introduced a bunch of characters and all for nothing.
The time-skip was poorly done, I would have preferred a jump at the beginning of S2 rather than half way through.
About the spin off, I'm on ep 3 but it does not look good. There are weird jumps which leave you wondering tf is going on.
It starts by showing you why Simbad has the right to be king, and is in route to become a story of how he met all his djins and vassals.
I don't think this series gets to explore Simbad's faults which earned him the distrust of Yunan and his own household members. That would be cool but I don't hold any hope.