The phrase "aesthetic flaw" is correct and usable in written English.
It can be used to describe a perceived imperfection or deficiency in the visual or artistic quality of an object, design, or work of art.
Example: "While the sculpture was impressive, the artist acknowledged that there was an aesthetic flaw in the proportions of the figure."
Alternatives: "visual imperfection" or "artistic defect".
When gold prices began to surge this winter, the weight of the flawed coins overshadowed any aesthetic flaws.
Xinhua said some workers were unhappy when Apple strengthened quality inspections of the iPhone 5 after consumer complaints regarding aesthetic flaws in the phone.
Despite the model's success in explaining decades of experimental data, theorists believe it has logical and aesthetic flaws and that its complicated structure is unlikely to represent natural law at its most fundamental level.
You could say Rogers has fallen back on an old-fashioned thriller format, but I am willing to forgive the play's aesthetic flaws for the urgency of its humanitarian theme.
Given the predictability of results, deterministic approaches are thus more desirable in a document production setting, where documents cannot be manually inspected for aesthetic flaws.
Also in the email, Foxconn said it received instructions from Apple to "strengthen quality inspections" for the iPhone 5 — "following multiple complaints from customers regarding aesthetic flaws in the phone".
His Torvald is a young, highly sexed, deeply ambitious man with a strong aesthetic sense: his fatal flaw is that he sees marriage as a "performance" in which Nora is expected to play the role of fluttering songbird.
At times, the ideal side of the film and its cinematic side separate, and the gaps register as flaws in the aesthetic texture, letdowns in artistic energy.
Art, for Kant, was not merely one among many objects of aesthetic interest; it was also fatally flawed in its dependence upon intellectual understanding.
The "new" is a refugee of the Modernist era, which hints at some of the flaws of James Bridle's "New Aesthetic".
