"keen feeling" is correct and usable in written English.
You can use it to describe an intense emotion or sensation. For example: When she read the letter, a keen feeling of disappointment washed over her.
Meanwhile, her keen feeling for footwork keeps supplying a bubbling stream of air into her dances.
These events, though told with some fairly keen feeling, are less than momentous.
I looked out at the handicrafts and had a keen feeling of the world slipping and changing.
Even if the Essex side never quite believed in miracles, they did enough to leave Keen feeling "nothing but pride for the way they've represented the club".
On Sunday he played this touchstone Bach score with crisp articulation, verve and a keen feeling for the character of each variation.
Ms. Fleming, looking and sounding radiant, shaped each phrase with sensitivity to the words and a keen feeling for nuance and color.
In answer to the first charge, Spurling — backed by access to Matisse's immense correspondence, among other previously withheld archives — contends that the artist, after his marriage, rarely, if ever, had sex with models, despite his keen feelings for many.
High schoolers are obviously keen on feeling accepted, and class-clown types are the absolute worst when it comes to this.
"But I was feeling keen angst.
The novel's opening epigram, from George Eliot, tells us how we would truly be overwhelmed if we had "a keen vision and feeling of all ordinary human life".
Oddly enough, the missing piece is perhaps the best description of the one thing that every great writer really does need: a keen vision and feeling of ordinary human life.
