The phrase "arguably huge" is correct and usable in written English.
It can be used when expressing a subjective opinion that something is large or significant, while acknowledging that this may be open to debate.
Example: "The impact of climate change on global ecosystems is arguably huge, affecting biodiversity and weather patterns."
Alternatives: "potentially massive" or "possibly significant".
Here, too, Soderbergh's casting pays off two (arguably huge) risks.
In order to reduce size and footprint they had to abandon the arguably huge 30-pin solution for the arguably more elegant Lightning port.
With an (arguably) huge unmet level of demand for enterprise mobile apps in general, there is sure to be more interest in the architectural mechanics of mobile software application development and operation in the immediate future.
Detroit's annual State of the City address is a time for the city's leader to bring focus and a sense of purpose to the arguably huge task of saving the Motor City from insolvency.
Basically he's proven that someone with a dedicated fan base (arguably a huge one) can make his or her own way in the world without the studio model.
The news of his arrest is arguably a huge embarrassment for US regulators.
This is arguably a huge benefit for profit margins of businesses in the sharing economy.
That's arguably a huge increase in freedom, much like the Affordable Care Act seeks to deliver now.
Arguably the huge increase in portraits at this year's event can be attributed to the proximity of the shoot to the Supreme Court's ruling on Proposition 8 and DOMA and the fact that a growing majority of Americans are now in favour of marriage equality.
Facebook could also decide to further the relationship with Bing and serve up Facebook enhanced results to logged in users on Bing's platform - arguably a huge advantage over Google in the realm of social results and another potential place to leverage ads.
But the issues that are on the table are huge, arguably the most important of my political lifetime.
