The phrase "none too" is commonly used to denote a negative degree or intensity. Synonyms for this phrase could include "not very," "hardly," "scarcely," "barely," "just barely," or "not particularly." These words or phrases provide a way to convey a lack of enthusiasm or intensity. For example, "I was none too pleased with the outcome of the meeting" could be rephrased as "I was not particularly thrilled with the outcome of the meeting." Switching up the phrasing can provide a more nuanced way to express emotions or thoughts about a situation.