There are nontrivial issues involving policy and project goals involved in what seems like a simple procedural matter.
Most impassioned VfD discussions result from disagreements over the fundamental goals of the project, hence the general criteria for inclusion of material, and as something of a side effect, the impact on any particular article. Imposing a voting system will not solve that, and the trouble with ballot-box stuffing will only get worse. [[Meatball:VotingIsEvil]]
I believe that a healthy discussion of project goals, the sort of articles we want, the sort of articles that have no place --- would take us a long way towards building consensus on deletion matters generally.
As others have pointed out, some participants genuinely believe that an article with any information content at all belongs at Wikipedia, even those that have only a sentence or two; these people have a broad view of the project as an information source for most anything. Others see Wikipedia as closer to a print encyclopedia, to varying degrees.
I suggest that an attempt to better understand (if not resolve) these fundamental issues should occur before any changes to deletion policy.
Louis