when.join antipattern?

index.js

var promise1 = require('./promise1');
var promise2 = require('./promise2');
var promise3 = require('./promise3');

promise1()
  .then(promise2)
  .spread(promise3)

promise1.js

var when = require('when');

function promise1(){
  return when.resolve('my promise1');
}

module.exports = promise1;

promise2.js

var when = require('when');

function promise2(promise1){
  return when.join(promise1, 'my promise 2',  when.resolve('a third'));
}

module.exports = promise2;

promise3.js

function promise3(promise1, promise2, promise3){
  console.log(promise1, promise2, promise3);
}

module.exports = promise3;