Regarding Blue Ez
Me, in an Ez complaint thread
In this directionless cryfest I see a massive thematic opportunity. Ezreal is a hextech user, perhaps his hextech can synergize with certain items to change his Q effect and then just balance the various new Qs he has available to him.
Examples
= Pinpoint Shot -- Mystic Shot can now critically strike.
= Icy Shot -- Mystic Shot deals 125% of his base ad bonus damage and applies a slow in a small AoE.
= Triple Shot -- Mystic Shot strikes thrice, with 2nd and 3rd hits dealing damage equal to his base ad.
= Arcane Shot -- Mystic Shot is converted to magic damage + tweaks in the form of bonus damage to be equivalent to previous Lich Bane usage.
A maximum of two upgrades can be used for the sake of Triforce+Edge/Reaver. All other on-hit effects are applied normally, excluding the above items if 2 are already purchased.
Considering many have noted that Ezreal has caused several items to be nerfed, this addresses that by allowing Ezreal specific balance for the items while keeping the items themselves balanced around their main users. This would also cover any items released in the future, since fixing an issue is as simple as adding a new Mystic Shot upgrade.
This maintains and improves upon Ezreal's build diversity. Note the Triforce change allowing interesting on-hit interactions -- I had Cleaver in mind. Newfound abuse methods are easily addressed as it is far easier to deal with any issues that arise when changes only affect Ezreal. Which means Ezreal is always strong but fair while keeping several playstyles equally viable.
Mystic upgrades don't necessarily need to be limited to on-hit effects, which opens up a ton of possibilities.
Not gameplay related, but different shots can have cool particle effects depending on the shot variation.