The phrase "a drastically transformed" is correct and usable in written English.
It can be used to describe something that has undergone significant change or alteration.
Example: "The city has become a drastically transformed landscape, with new buildings and parks replacing the old structures."
Alternatives: "a significantly altered" or "a profoundly changed".
Muriel Spark's imagination has been set off by real events before, but The Abbess of Crewe offered a drastically transformed account of Watergate.
But unless we go back to the caveman world, some people will find the drugs increasingly necessary to succeed as knowledge workers in a drastically transformed modern world.
Which bid will prevail is impossible to predict, but regardless, ABN Amro will become a drastically transformed entity.
More oil means less Arctic sea ice, which means a drastically transformed future for generations.
What was initially meant to be a group dispensing security to Shi'ite communities across Iraq drastically transformed into a sectarian death squad ethnically cleansing Baghdad and other cities of their Sunni inhabitants.
He leaves behind a party that has been drastically transformed since it was created in 1961 through an alliance between the Co-operative Commonwealth Federation, a socialist party formed during the Great Depression, and the Canadian Federation of Labour, the umbrella organization for organized labor.
As a mainstream therapeutic method, kidney transplantation has drastically transformed the health quality of patients suffering from end-stage renal diseases.
It has torn apart local communities, caused a mass exodus of low- and middle-income families, and drastically transformed the culture of San Francisco.
The governing party quickly embarked on a Chinese-style infrastructure-building spree, and some parts of the country have been drastically transformed.
Similarly, Swanberg has drastically transformed his work.
That, in turn, would have drastically transformed the picture presented by Enron's reported financials.
