As someone who has had a hand in creating or developing all the metrics you cited in your most recent article, you can feel free to email me your related questions.
To answer the question you sent Sean (Forman, not Foreman):
What WAR gives us is a systematic, consistent framework to value the accomplishments of players. The good thing about a framework is that each person is free to create his own implementation. Not all houses are built the same, but they all follow the same principle. That’s what WAR gives us. For example, WAR forces us to value a random HR about 1.1 more runs than a random walk. You can’t say that you will ignore the walks of one player and then really pump up his HR. WAR quantifies the performance of a SS relative to the performance of a 1B. WAR establishes alot of what you need to consider.
But WAR also gives you leeway to introduce your own personalized expression. For example, while Sean Smith’s implementation of the WAR framework I developed does not consider clutch performance, you can create a Murray Chass implementation of WAR that does include clutch performance.
Consider this email as an opportunity for dialogue and education.