Sometimes, the people getting the most done, are either doing so based on proficiency (i.e. deep understanding of domain, system, language, stack etc) or are simply adept at finding the shortest path from a(requirements) -> b(code). These are the people I look out for, as essentially the root of tech debt. Hopefully, things like code-review will prevent people like this from pushing code that only they can understand, but that theory often proves false as these folks often out-rank you. Don't be afraid to call BS through any means available. At the very least, you need an explanation/comments/documentation explaining why simplicity was sacrificed.