And the ts devs support this

Having unit and automated integration tests backed by both requirements and high code coverage. As a lead I can verify that not only you made the change to support the requirements though these unit tests but also a really quick verification that other functionality may not have changed based on your large scale change. Helps a lot for significant refactoring too

This is the basis behind scrum. Throw some customer feedback on those smaller releases and plan correction good to go.