"easily imaginable" is a correct and usable phrase in written English.
You can use it when you are trying to describe something that is fairly simple to visualize or mentally process. For example, "When I described my plans for the party to my friends, they could easily imagine what the party would look like."
But that new world is not instant or easily imaginable.
Unfortunately, since September 11th those views have become more easily imaginable.
Given the show's name, the endings are easily imaginable, but there is plenty of drama along the way.
A Cubs or Red Sox victory is as easily imaginable as the final moments of a made-for-TV movie.
She grew up at the height of the "sunshine era" of engagement with the North, when unification was more easily imaginable.
His teammates range from hulking to scrawny, some with scraggly beards and wire-rimmed glasses more easily imaginable on earnest graduate students than on the leading alpha males on campus.
You'll note that both dough and filling require high-gluten flour, which makes for the most easily pliable dough imaginable, and makes any sauce thicken fast and without a trace of flouriness.
Mp3 blogs are now a common way for fans to discover new music, covering every genre imaginable and allowing you to easily sample the music.
Along the path grow exquisite, miniature Alpine flowers in every imaginable color, so tiny you could easily miss them.
A general election pitting Clinton against Trump would offer about the most Manichaean contrast imaginable in American electoral politics, thus easily fulfilling McDonald's second condition.
Parr's whole schtick, one could argue quite easily, is sentimentalism – a nostalgia-merchant wringing every drop of pathos imaginable out of a photo of a foamy pint held mock-heroically by a face-painted football fan. .
