I find your post interesting, and your points in many ways are an accurate analysis of many major problems with Wikipedia - yet I still find your point 11 ("The wiki is the problem") a non-sequitur. A wiki is in essence a model for data storage, where the expectations for interaction and data management are closer to control versioning than to the classic CRUD cycle. As such, it's a neutral tool that could be used in many other ways and improved to cover most of the current shortcomings; in particular, there's no reason why those other "practical solutions" and workflows for organizing content couldn't be built on top of a wiki-like storage layer, so the contradiction you see doesn't exist in essence.
The problems you mention are for the most part caused by the community dynamics and rules, with a few caused by the current wiki platform, rather than the wiki storage model itself.
The only point directly related to organizing things as a wiki is point 6, "Page ownership" - which is a real problem, but only exists because of the decision to build an encyclopedia where each page is an article that can be edited by anyone, not because the tool for storing the page is stored a wiki system. Every other point is caused by the project's original view as an anarchist playground which permeates all its policies, not any inherent limitation of the software.
As for the approach taken by newslines.org, I agree that there's a need to give visibility to contributions from any user without giving the next editor in the line the possibility of removing them completely without trace; though that doesn't the benefits of a wiki.
Newslines is good for news-driven topics, but there's a need for an encyclopedia-like description of the topic, that a list of unrelated news doesn't cover; there needs to be a coherent wording that describes the highlights of the topic and how each part relates to the whole, and a wiki page covers that need. Compare the pages for Ebola at Wikipedia and at Newsline - which one would you prefer for first learning about the disease, and which one for staying up to date with recent developments? It's clear that they serve different, complementary purposes.