Dear Sofdrak,
I’m really sorry you experienced issue with EasyTimetable extended edition but despite my effort to get information about your issue (you are the first one to report) and to provide you a good support, you did not answer me in a way that would help you with your problem and see the error in question.
About the to-do features: You’re are right there are many things to do and there will be even more when I would have add those listed you mentioned. I don’t know a developer who is fully satified with its work and don’t want to add new functionalities to his plugin. As you clearly could read it, these are features to come.
I’m sorry you regret having purchase the extended version, but I provide a free plugin that gives the opportunity to anyone to test it on its own system to see if it fully works. There is also a demo site that allows everyone to see if the features of the paid version match their needs, for the front-end display. An access to the backend of this demo site will be soon added thanks to the forthcoming new role features I work on.
And at last, it is possible to ask pre-sale questions on the forum or by email, before to purchase the product.
Best regards
Anthony