Surely in the age of Twitter and content creation, everyone can agree that character count is often more important than word count.
No publisher academic institution or professional organisation I know of requires content to be submitted on the basis of
character counts. Except for a few specialised areas, every one of them that I am aware of works with
word counts. Clearly none of them agrees with you that "character count is often more important than word count". Neither does MS, whom I expect keeps a watchful eye on how people use its products. Other word-processor manufacturers view the world
similarly. Aside from trivialities such as SMS & twitter, the use of character counts is typically found in situations where the person submitting the content is charged on the basis of character counts (e.g. for classified advertising); again, hardly the
thing you'd use Word to prepare on a regular basis.
I fail to see how your reference to a suggestion re blogs is relevant. The suggestion makes a tendentious claim if ever there was one. Ask yourself: how many blogs are governed by
character counts?
As Doug says, though, you can always make your own suggestion at uservoice. Doubtless that would carry more weight if you gave credible evidence in support of your suggestion that "character count is often more important than word count".