Alternative to MFTF Merging and beyond

idea.php

<?php

/**
 * Below requirements summaries what needed to offer the same / better levels of customisation of "MFTF Merging"
 *
 * Requirements
 *
 * 1. Able to accept random arguments (offering extensible test case inputs)
 * 2. Able to insert step in between two steps (offering module decoupling)
 * 3. Able to communicate between steps
 * 4. Able to overwrite / update / remove existing steps
 *
 * (optional)
 * 5. Able to generate all boilerpate codes (if any) (offering better developer experience)
 */

/**
 * Approach A
 *
 * Passed: 1
 * Failed: 2, 3, 4
 */
class LoginFacade {
    public function login($username, $password, ...$args) {
        $this->pageObject->fill('username', $username);
        $this->pageObject->fill('password', $password);
        $this->pageObject->click('login');
    }
}

/**
 * Approach B
 *
 * Passed: 1, 2, 4 (with decorator)
 * Failed: 3
 */
class LoginComposite extends LoginFacade
{
    public function __construct($components = [new LoginFacadeFillingForm(), new LoginFacadeSubmittingForm()])
    {
        $this->components = $components;
    }

    public function login($username, $password, ...$args) {
        foreach ($this->components as $component) {
            $component->login($username, $password, ...$args);
        }
    }
}

class LoginFacadeFillingForm extends LoginFacade
{
    public function login($username, $password, ...$args) {
        $this->pageObject->fill('username', $username);
        $this->pageObject->fill('password', $password);
    }
}

class LoginFacadeSubmittingForm extends LoginFacade
{
    public function login($username, $password, ...$args) {
        $this->pageObject->click('login');
    }
}

/**
 * Approach C
 *
 * Passed: 1, 2, 3, 4 (with decorator)
 */

class LoginComposite extends LoginFacade
{
    public function __construct($subjects = [new LoginFacadeFillingForm(), new LoginFacadeSubmittingForm()])
    {
        $this->subjects = $subjects;
    }

    public function login($username, $password, FacadeContext $context) {
        foreach ($this->subjects as $subject) {
            $subject->login($username, $password, $context);
        }
    }
}

class LoginFacadeContext implements FacadeContext{
}

interface FacadeContext {
}