Faraaz-
it's the asymmetry that needs to be addressed. A template that is supported by 3 people but opposed by 7 may not pass TFD because consensus is required for deletion. Hence, we end up with lots of templates that are supported only by a minority of users. Both sides of the debate often see an unsuccessful TFD as a victory for the template-supporters and accept its use.
We need to make clear that a template is a fundamental intrusion into the article namespace and, like a policy, needs broad community support before being put into active use. If 3 people strongly oppose a template and 7 support it, then their objections need to be resolved just as much as in the opposite situation, *before* the template is tagged onto articles. Marking templates as "proposed" is an important step towards clarifying the distinction between merely keeping a template and allowing its use.
Erik