What about that?

import { parse } from 'parse-function'

const pluginsArray = [
  (node, result) => {},
  (astNode, result) => {},
]

const result = parse(string|Function, parserOptions, pluginsArray)

// or without passing parser options
const result = parse(string|Function, pluginsArray)

We are just removing the extra step of creating "app" instance and then calling parse.
Also removing the use so called "smart plugins", we don't need to change anything to that "app" instance.

So now plugins are more simpler and flat, instead of (app) => (node, result) => {}

Should be noted that we can't just add plugins property to the parserOptions, because will conflict with babylon for example.