There isn't really any other option that is federated, has video calls and screensharing, and offers encryption besides Matrix/Element, which I've personally had a lot of usability problems with, and it's encryption has a concerning metadata issue and thus I don't really recommend it.

Not sure where a user would need admin help with Movim, it's pretty slick and user-friendly. I consider it the best working alternative that's using a proven back-end technology that we currently have available.

All other centralized alternative Discord clones on the market are generally still in an alpha or beta-stage, don't offer encryption at all, and use unproven back-ends that may not be able to scale to a large user-base. Where as the Movim client has been in development since 2010, allows for federation (like lemmy/piefed) to scale up, and is ready to use in the here and now.