It's not a significant amount of time more. You run !jf and then immediately !shaped-convert. Though I plan to reduce this to 1 step soon.
This script is meant to convert existing creatures, not to import creatures.
I plan to have a script that imports as well. I will likely fork JF's work as I'll need to import attacks to NPC attacks as well.
My plan is to have both NPC attacks and the importer done by this weekend.