There are several synonyms that can be used in place of the phrase "all too obvious". Some of these include: glaringly apparent, blatantly clear, unmistakably evident, painfully obvious, and overly conspicuous. These words all share the same meaning as "all too obvious", which signifies that something is very apparent or transparent without much effort or thought. When writing, it is important to vary your vocabulary in order to keep things interesting and engaging for the reader. Substituting common phrases or overused terms with synonyms can help you achieve this goal and make your writing stand out.