Learn Italian: L'eccellenza è il requisito, non un livello ordinario qualsiasi. - Excellence is the requirement, not just any ordinary level.

Placing qualsiasi (or qualunque) after the noun adds emphasis. While qualsiasi livello just means "any level", un livello qualsiasi means "just any level" or "some random level", adding a tone of indifference or mediocrity. Here, it emphasizes how basic an "ordinary level" is.

Why do we need the article un before livello if qualsiasi already translates to "any"?

The grammar changes depending on where you put the adjective. When qualsiasi comes before the noun, it replaces the article, so you just say qualsiasi livello. But when you move it after the noun for that emphatic "just any" meaning, the noun requires a standard indefinite article, making it un livello qualsiasi.

Could I use qualunque instead of qualsiasi in this sentence?

Yes, absolutely. Qualsiasi and qualunque are essentially identical in meaning and grammar. Saying non un livello ordinario qualunque would carry the exact same emphatic meaning.

Why does eccellenza have the article L' when the English translation just says "Excellence"?

In Italian, abstract nouns representing concepts or ideals (like eccellenza, amore, or pazienza) require a definite article when used in a general sense as the subject of a sentence, whereas English simply drops the article.