Replace Crit Chance with Focus

This is another one of those 'get RNGesus out of my competitive game' topics.

Idea is pretty simple. Crit Chance gets replaced with a new stat called Focus. Every second you gain points in your crit meter equal to your Focus score. Once Focus reaches 100, your next basic attack will critically strike and consume 100 Focus. Obviously the amount of Focus on various items wouldn't match up exactly with the crit% on current items since there would be cases where you WANT more than 100 Focus (on anyone with more than 1.0 attack speed) where as more than 100% crit chance is just a waste of gold.

The Pros

1. No more RNG!
2. Clear visual indicator on the crit meter lets foes know that they'll eat a crit if they try to trade with you.
3. Easily integrated into the game. Ashe just gains bonus %damage based on her Focus stat. Samurai Bob builds Focus twice as quickly.
4. Gives more room to adjust auto-attack damage if pew pew is too strong or too weak.
5. Opens up opportunity for neat new item effects (store more than 100 Focus. Gain bonus Focus for auto-attacking. Gain bonus Focus for moving, ect)
6. Makes a little bit of Crit more attractive on a much wider range of champions.

The Cons

1. Some people like randomly eating crits three attacks in a row by Try at level 1 and losing lane.
2. Getting raw DPS to be exactly the same as it is on Live would be tricky.
3. Chasing and getting off an attack every now and again (or kiting for that matter) would probably get stronger while humping each others legs and slugging it out would probably get weaker. (or maybe this is a pro, depends on your point of view).

Thoughts?