One important feature that will help me immensely with page loading time is the following:
When one adds a new event to the calendar from the front end module, one must upload a new image each time. In many cases, they are the same image already on the site for similar events on other days/times (but not recurring in that sense). So I wind up with hundreds of the same image, where only one would really be needed IF the module had the ability to select an already uploaded image. If you could add that, it would solve a TON of problems for me, i.e., access to a shared folder of previously-used images.