In all honesty, I don't really enjoy having Ezreal's on my team anymore. For one, the build takes too long to finish and everytime Ezreal is on my team, I lose. Ezreal is that champ where if I have him on my team, he feeds. If the enemy team has him on their team, he can't even be attacked, let alone jumped on.
I honestly cannot see this "damage" that everyone says Blue Ezreal outputs. As far as I'm concerned, it doesn't do much of any, even at full build. I feel like the build is just nothing but utility for self-peeling purposes. Blue Ezreal is more annoying than he is threatening, but that's just my opinion. I always build AD Crit/Triforce Ezreal, because I'd rather my auto attacks do something rather than be stuck spamming a button for miniscule poke and no reward.
TL;DR - While ya'll may see Blue Ezreal doing good damage. I don't see him doing any. I would rather Ezreal build AD Crit builds over Iceborn "slow" builds, any day.