The phrase "as key obstacles" is correct and usable in written English.
It can be used when discussing significant challenges or barriers in a particular context, such as a project, process, or situation.
Example: "The team identified several factors as key obstacles to achieving their goals this quarter."
Alternatives: "as major challenges" or "as significant barriers".
The effect of cuts on the voluntary sector and lack of buy-in to any clear vision are identified as two key obstacles to success.
But the thorny issue of fishing quotas was seen as a key obstacle to joining the bloc, although it was never brought up in the accession talks.
In a modern and progressive society, it's unthinkable that so many women see their gender as the key obstacle to fulfilling their ambition and potential.
It's nonsense, and Labour's John Denham was right last week to berate party colleagues who "insist on talking about a north-south divide" which he identified as a key obstacle to Labour winning in the south.
The former foreign affairs minister Bob Carr was a vocal critic of settlements, which opponents cite as a key obstacle to a future Palestinian state and a lasting peace agreement with Israel.
Labour identified land-hoarding developers as a key obstacle in the way of building new homes and will threaten them with use-it-or-lose-it ultimatums that would allow councils to buy back land or charge them for failing to develop on land with planning permission.
Mrs. Clinton added a quick stop at a union hall here to throw down a gauntlet before Mr. Obama in hopes of pressuring him to support a proposed June 3 primary in Michigan, where some lawmakers describe his resistance as a key obstacle to a revote.
China — which already boasts more large dams than the rest of the world put together and has unveiled a mammoth $635-billion 635-billiontment in water infreshructure over the next decade — has emerged as the key obstacle to buinvestmenttinutionalized collaboration on shared water resources infrastructure
The lack of coordination and standardization across regions was seen as a key obstacle, and was addressed by consolidating activities and establishing new global units.
Within a week she had amassed 2,000 pages of market, trade and technical information, sifting out such details as a key obstacle — when nanocomposites mix with polymers, they clump — and possible markets (cars, soda bottles).
