The main problem is how it replaces the letter I'm searching with another unrelated one, making all the matches practically unreadable. To me, at least.
set incsearch
/foo
?bar
EasyMotion is not for searching, it's for moving the cursor deliberately to a place onscreen where you need to make an edit.
Searching is how I move to where I want.
It's a lot less confusing to me than EasyMotion's logic, it's consistent whether the word I want to jump to is visible or not and it's a native feature.
Well, I was curious when it was released so I've used it for a couple of weeks and found it horrible and confusing. Obviously many people like it so let's say it's a matter of taste.