Post-Game "Vision Score"

I just played a great game with Teemo. I finished 1/0/5 and a B+ performance. Teamwork made the game great. Late game I was able to cultivate a massive mushroom crop in the enemy's top-side jungle. Since I started Spellthief's to abuse some easy income, I decided to get a Sightstone build to help my shrooms light up the enemy jungle. Teemo's shrooms don't provide much vision, but they do provide vision. This is also the case with Shaco's boxes, or Cait's snares, etc. When I was checking my breakdown I noticed my vision score was oddly low considering I had so much of the map "discovered" during the course of the game. The Vision Score only counted the actual wards I placed/destroyed, and not the actual function of vision.

So I thought of a way that Vision Score might be better calculated. Every Champion has a vision range, so a good way to calculate vision is a rate: Extra Vision per Second (VpS). To keep the numbers simple, the value of "V" can be expressed by a percent of champion's base vision. Consequently, stepping on a Teemo shroom, Cait snare, etc. should constitute as "disrupting vision" and could be calculated by the same VpS rate but determined by time left of vision.

For Example:

One Teemo Shroom: let's pretend a shroom lasts 50 seconds and provides 5% of Teemo's Base Vision. Shroom provides V vision for S duration. Enemy steps on shroom after 25 seconds: Teemo gets (.05V x 25S) or 1.25 VpS. Enemy also gets a Vision Score for "destroying" vision based on the amount of time remaining and also gets a score of (.05V x 25S) or 1.25 VpS.

This mechanic would help the Vision Scores of ADC Champions like:

Also- I think Vision Score should consider how many Enemy Champions were revealed. So let's say 2 enemies are in a bush and Quinn uses her vision ability to reveal them: she would get 2 points for Enemy Champions Revealed. Or if Sweeping Lens was used to reveal an invisible Teemo.

Anyways- that's how I feel about Vision Score. Let me know what you think.