You get pepsied even on "miss" attack, it should not work like that.
In comparision archer AC drop only works on "hit" and renders the skill very hard to use, with now impemented counters to it.
Why not make pepsi work on "hit" only to balance those skills a bit.
Since nerfing pepsi skill has been a bit debated and nothing has been done so far i suggest that you atleast fix the damn skill.