Invoicing: For all the companies I've worked for, they already have some platform they've been using since time began, and use that for invoicing. The only time I would use that feature would be if I become a freelancer, and that's not looking likely. I'm sure it would be nice for freelancers, if any use my project 😄
Cute scheduling interface: From a UX point of view, having to go to a separate page to schedule tasks would just be annoying, unless it's just another way to schedule tasks in addition to the current one. It would, alternately, be nice to have some sort of calendar integration (Google Calendar, perhaps) to visualize when things are due. We'll see.
Mind Map: I feel like this is basically just a re-implementation of a Kanban board, but I can see some value over that interface, though. The biggest blockers for this feature are A) the existing question of switching between the current interface to Kanban to this one and B) the technical difficulty of implementing this interface in an intuitive way.
Just watch the video for https://zenkit.com/ I want it all...