Hello Łukasz Dryl, 

Thank you for your purchase!

Many locations to one employee can be added - when you go to employees' 'work hours' you can set different work time periods and assign different services and location for each of these periods. But you can't set more locations for the same work time period, though, if this is what you want to achieve. 

Regarding the service subcategories, unfortunately, at the moment we don't have a plan to add it as a feature in Amelia, but maybe in the future releases we will consider implementing this. 

We have a list of feature requests and we try to implement as many as we can in our updates, and the most requested features are in the top of our list. Some of our priorities for now are : Front end booking cabinet for customers, Recurring appointments, Zoom integration

You can also check out the feature requests and vote for the features that you want to have following this link.

If you have any further questions or concerns don't hesitate to ask,