Flash rework idea

We all know flash is most of the time not used has intended by riot =.= Right now flash is more of an escape from bad play card then being a tool for engaging a fight (bad vision control? got flash! bad fight? got flash! bad positioning? got flash!)

So here's an idea based on the smite rework.

Step 1 : NERF FLASH Flash cooldown is now 10 min. (now people might consider using ghost instead, that would make people choose exhaust, then cleanse, making choosing summoner spells an actual rock/paper/scissor)

Step 2 : Flash only items basic ruby torch : +150 health lower flash cooldown by 50% 450 gold

basically a costly ruby crystal with bonus to flash only purchasable if you have Flash (it's troll safe)

Step 3: Upgraded items tank items cause you wanna flash in not out ! With flash bonus like upgraded range or double stack or small area slow or extra movement speed toward enemies or ...

Obviously flash will still be picked but now it actually has a drawback to it, making it more of a tactical choice then an must take. What do you think ?