The phrase "a patchy one" is correct and usable in written English.
It can be used to describe something that is inconsistent, incomplete, or lacking in uniformity, such as a performance, experience, or quality.
Example: "The report was a patchy one, with some sections well-researched while others were poorly written."
Alternatives: "an uneven one" or "a sporadic one."
But in practice the track record of the commercial television regulators has been a patchy one.
Many institutions are starting to get to grips with the challenge but the picture is a patchy one.
But again, I don't think it's too crazy to say that you'd rather see a fully functional subway system rather than a patchy one that just so happens to let you check into FourSquare as you stand on the platform.
In December the group declared a ceasefire, though it has been a patchy one.
Prices are still 30% below their peak in 2006, but the data provide more evidence of a recovery in the housing market, albeit a patchy one.
If this is Apple's business strategy, it remains a patchy one.
There's a slightly patchy one – Nell, Ted And Marlon – about a member of So Solid Crew helping out with a community choir, but the real treat here is Alex Lowe and Fraser Steele's Barry, featuring Lowe's octogenarian character Barry from Watford.
A patchy picture one might say.
However, even with a large number of cameras, the information tends to be patchy (one rarely has complete coverage of the entire area) and most of all requires complex interpretation in terms of the overall coherent picture and global parameters.
Being an MEP is more like a real job.In parallel, there are signs, albeit somewhat patchy ones, that pan-European political groups are emerging as genuine political actors.
When you use public transport in LA, it is impossible not to notice that unlike say, London's tube or some other US cities' provision, it's not so much a network as a patchy attempt at one, which is overwhelmingly occupied by people on low incomes and the working poor.
