Honestly Iron Fist was just starting to get good when it was cancelled. The whole 1st season was a wasted opportunity but the 2nd season was totally on an upward trajectory.
Honestly I agree. If they wanted to bring Finn Jones back, just pretend the season 2 story happened and continue from there.
(Although I imagine if they bring any of them back they will yada yada yada all of their backstories. Netflix will be a different universe and in the MCU universe things were similar, but not 100% the same.)
Yeah let the writers do whatever they need to get us to the rest of the immortal weapons stories. It was one of the best runs of the comics and one that would make for a fun season.