It’s easy to cover content, but that doesn’t mean your students are learning.
Just because the students are a large audience doesn’t mean they can’t participate in their own learning! A podium and a stage seems to inspire long stretches of talk, and the physical distance from students encourages personal and intellectual distance. You do not need to make personal contact with every student in every class—imagining that you do will make you crazy and ultimately frustrate you into giving up. However, your students can make personal contact with each other, some of them with you, and most of them with the material in each class.
Increase student involvement (remember: Involved Students Learn!)