Thank you for your message. Unfortunately phinx is not supported and we're not able to easily modify the current export to support what you need.
This would mean creating complete support for phinx and probably there will be necessary more changes than these two mentioned.
Bot changes you're mentioning aren't defined in any user-based template but hardcoded in the framework support including some other dependencies.
In case more users will be interested in phinx support we can consider the full phinx implementation later. Thanks for the understanding.