We take the best things from apps that we have found.In addition we provide real-time feedback during the class which is filling the gap made because of the lack of non-verbal communication. Also, we would make app with more clarity, because we wouldn't use a simple subject-student structure, but would use a triangular one (Subject-professor, and professor-student and subject-student) that way on professors profile students could find what subject they have, and which fields of study are theirs. Also, we would add a social-network component in order to help students connect with each other and with professors, building some kind of resume on the app, this is the best way to make online networking.
Besides that, when making a classroom, teachers can choose one of a few class modes,standard meeting, workshops, conferences, seminars etc. (Something like interfaces of the apps GatherTown, WorldWall, Zoom, Teams...) This way the app can be used to make studying more interesting, and even maybe to use it for non-formal education.