Let me begin by saying that worship involves the emotions. However, song leaders should not be expected to function as cheerleaders. Expecting worship to make us feel better is reaching for an artificial emotional high point. Song leaders and preachers are not to manipulate the emotions. Eugene Peterson writing about prayer provides insights for worship.
Feelings are the scourge of worship.
To worship by feelings is to be at the mercy of glands and weather and digestion. And there is no mercy in any of them. But feelings are no more spiritual than muscles. To suppose that our emotions in any way give us reliable evidence of the nature or quality of our life with god is to misinterpret them. They are wonderful and necessary and glorious.