"serious pitfalls" is correct and usable in written English.
It can be used to refer to a problem or difficulty that is quite serious in nature. For example, "Without proper guidance, trying to study for a difficult exam can have some serious pitfalls."
I can understand the motivation but I think there are a lot of serious pitfalls along the way here for us to consider".
Some Westerners in Afghanistan who are monitoring the security transition saw the parliamentary vote as demonstrating a good impulse to improve two powerful ministries, but one with serious pitfalls.
In the meantime, the review is a good idea, but its serious pitfalls are reminders of the rising costs of our national failure to fix a broken immigration system.
The process is pretty simple but has serious pitfalls as given below.
But once you find out your computer is tainted, getting rid of the offending software is tough and comes with serious pitfalls.
Xiong Minghua, Tencent's CTO, said in a speech at the ChinaBang Awards ceremony (which was hosted by my Chinese bilingual media blog, TechNode) that years ago in its early stage, Facebook encountered some serious pitfalls such as where Facebook was heading (product direction) and how to make money (business model).
Most said failing to research the target company was a serious pitfall, too.
This helps him avoid a serious pitfall, an overabundance of liquid in the pan, resulting in mushy apples and a soggy crust.
In a preface to "The Griffin and the Minor Canon," Sendak describes his basic aim as an illustrator: "I wanted at all costs to avoid the serious pitfall of illustrating with pictures what the author had already . . .
Furthermore, the lack of refined integration methods has been a serious pitfall for the possibilities for industrialization and the following commercialization of products deriving from the area.
Still, Edmunds argues that the model points out a potentially serious pitfall for countries outside of the United States considering varicella vaccination.
