Matrix.to should remember your homeserver, but a "matrix://" url scheme is being worked on [1]. Work on that is caught up a bit in the backlog however, but there are folks in the ecosystem pushing that along in 3rd party clients.

Communities are going away in favor of spaces (relatively?) soon. That was the topic of Matthew's talk at FOSDEM [2], and the entire experience should be vastly better.

[1] https://github.com/matrix-org/matrix-doc/pull/2312 [2] https://www.youtube.com/watch?v=TzUfS08lMek