GoToWebinar ranks high on the clunkiest PAID software I have ever used. A lot of intuitive functions are just missing, like deleting old test webinars. I cannot change the name of an uploaded video unless I go to the channel...
GoToWebinar is certainly not perfect, no software is.
I have tried lots of other webinar software and still keep coming back to GoTo as my favorite.
The corporate solution for this kind of software where I work is Skype. I have to jump through lots of hoops each year to keep using GoTo. IMHO the "clunkiness" of Skype used for a webinar makes GoToWebinar look like it is plated in gold.
Over the last ten years I have made several suggestions to GoTo for improvement. Some have been incorporated into GoTo and some have not. Meanwhile I focus on the work I can do with the tools I have.