You are not wrong but you may be hinting at the wrong cause. It is hard to generate a useful graph or summary that gives actionable feedback once you reach a certain amount of nodes. Even mix app.tree, which has no cycles, is barely useful after 30-50 deps because it becomes dense.

Using mix xref to evaluate your project will, at best, give you a very blurry picture. Think of it more of a database: it will give you good information when you need to answer certain queries.