Another question: What is the conventional thought here in regards to future changes to the schema? Is it to run introspect again? Or use Migration moving forward? I am seeing that introspect will override any changes I've made to the schema.

Yes, currently whenever you run introspect, it will override any changes made to the schema. Also Migrate is currently experimental and not suggested to use in production right now. To map your fields with the DB fields, there's this script that you could use to run after introspect so that manual changes are not required.