Neglected Ezreal
Ezreal got the short hand of the stick with the marksman and item changes this preseason. The changes were meant to reinforce Ezreal's synergy with cooldown reduction but it failed to do so.
Ezreal's kit naturally lacks synergy with crit. Essence Reaver and Trinity Force just don't work together very well right now. ER requires 30% crit to get the 30% cdr but Trinity only gives 20%. ER needs to crit to regain mana but Ezreal's Q cannot critically strike so you cannot regain mana from it. Trinity gives the least amount of crit of all the Zeal items so with ER you will naturally regain less mana over time. Trinity lost ap which means Ezreal's abilities have lost damage. His W is even less useful when going ad now. Because Trinity only gives 20% crit, Ezreal needs to buy another crit item to get the last 10% cdr or else he has to get it elsewhere With 40% CDR (the thing the changes were supposed to reinforce on ezreal), Ezreal's Q will go on cooldown for less than 1.5 if you land it. Meaning that maxing out your cooldown reduction will make you lose even more synergy with Trinity Force.