Is it sufficient to generally exalt Allah above the attributes of created beings without delving into the details of negating human-like attributes, and is this belief sound for salvation?

Leave aside the obsessive whispers concerning matters of creed. What you have mentioned about negating imperfections from Allah Almighty in a general sense is the creed of the Salaf, which is a general negation and a detailed affirmation. As Sheikh al-Islam Ibn Taymiyyah said, citing verses such as: "There is nothing like unto Him" and "And there is none comparable to Him." The way of the prophets is detailed affirmation and general negation, in contrast to the way of those who detail negation and generalize affirmation.