"has been fuzzy" is correct and usable in written English.
You can use it when you want to refer to something that has been unclear or hard to make out. For example, "My memory of that day has been fuzzy ever since I hit my head."
While all those signs pointed to a slowing economy, the picture has been fuzzy recently.
Ms. McFarland, who supports abortion rights, says her professional experience on national security issues would equip her for office; she has been fuzzy about how she would be a different senator, or a better one, than Mrs. Clinton.
The CDU's manifesto is a study in vagueness, so it can either couple with Germany's pro-business liberals or with a party that still espouses "democratic socialism .Ms Merkel herself has been fuzzy, hoping to woo voters who like her but not her centre-right party.
The line between politics and the church has been fuzzy for decades, but President Trump has now repealed the Johnson Amendment, which prohibited tax exempt organizations, such as churches and preachers, from directly speaking about politics from the pulpit.
Some of the encounters with passing vehicles have been fuzzy in terms of criminal intent.
Their futures on the show had been fuzzy because the creator of "The X Factor," Simon Cowell, had let it be known that changes were in store for season two.
In 1939, the Mint recut the hub for the nickel, sharpening the steps on Monticello, which had been fuzzy in initial strikings.
Mine have long been porous, which is a generous way of admitting that my lines between myself and others, in family and even more so at work, have been fuzzy.
National patent offices in most European countries already award patents on human gene sequences, but the laws surrounding transgenic plants have been fuzzier.
"The concept of an 'insolvent' bank has been very fuzzy during the crisis," said Dimitris Drakopoulos, an economist at Nomura.
Bidders complain that much in the 700-page sale document has been left fuzzy, not least Telekom's future involvement.
