One frequently reads writing advice to the effect that adverbs are the source of all evil. Some of these articles are so vehement I actually checked the Bible to see if adverbs were a result of Adam and Eve eating from the Tree of the Knowledge of Good and Evil in the book of Genesis.
My own, rather more liberal view on adverbs is simple: if you use them to clarify, no problem.
For example, in “Simon smiled happily” the “happily” is superfluous. On the other hand “Simon smiled cruelly” could work well, depending on the context of course. If Simon is busy sadistically torturing a victim, then “cruelly” would also be superfluous as his sadistic acts speak for themselves. On the other hand such a sentence could work if the expression turns a scene. Perhaps you think Simon is a good guy then all of a sudden he smiles cruelly, indicating bad things to come.
Another example: people can sigh for different reasons. “Simon sighed…” Contentedly? Wearily? Reluctantly? Again it depends on the individual scene in which Simon sighs, but sometimes adding the adverb helps.
In short, for me, good use of adverbs is no bad thing. As usual it is all about context.