The phrase "a drastic one" is correct and usable in written English.
It can be used to describe a significant or extreme change, decision, or action in various contexts.
Example: "The committee's decision to cut the budget was a drastic one, impacting many departments."
Alternatives: "a severe one" or "a radical one."
The switch from fogey-friendly Portland stone to the magic pyramid is a drastic one and not entirely smooth.
But it's not a modest proposal: it's a drastic one that stands little chance of actual success.
The increase was a drastic one, rising from $8 to $12 for the Holland and Lincoln Tunnels, and the George Washington Bridge, and even higher for the Hudson River crossings, at a staggering $15.
This new move is a drastic one, but it's worth a shot considering that their once-solid approach doesn't seem so solid anymore.
Notably, the jump has been a drastic one in the UK — where Apple had only a 30% share of sales as recently as a month ago.
Theresa's shift was a drastic one and it wasn't easy.
After the session, Security Council president Ismael Gaspar Martins of Angola told the press that "a resolution might be a necessity… because the situation is evolving towards a very drastic one, with the bombings continuing on hospitals, killing children in schools".
Labour politicians up in arms about Johnson's ticket office closure programme ignored the fact that Livingstone had drawn up a more drastic one.
The voice shift seems like a pretty drastic one for the company, but it's not exactly unprecedented for players in the messaging space to branch out into voice service.
Ebeling also informs readers about something the report does not cover: "While the downturn in defined benefit offerings among big employers is drastic, one bright spot the report doesn't cover is a resurgence in interest in these plans among small employers, typically under 30 employees". Janet Novack, State Tax Breaks For Seniors On The Chopping Block, Taxing Matters, March 2 , 2011
Advising women to "lean in" connotes small changes — a tilt here, a tweak there — over drastic ones.
