Thank you. As stupid as this sounds, it might expand the potential user base to mention PHP and what Composer is in the landing page copy. The reason is that the potential pool of DependenCI users is anyone who uses PHP so mentioning PHP lets more people know that DependenCI might be applicable to them. Mentioning the problem Composer solves, might put some PHP developers who are not using Composer into the funnel that leads to using DependenCI.
There is always a balance between boiling the ocean and focus. But a lot of B2B 'sales' is educating potential customers. Clearly, DependenCI is based on the idea that using Composer is a good idea. Spreading that knowledge expands the user base.