It's hard to establish just how much interest may rest in alternative formats to Arena. I think the % of members who ever read this forum topic is quite small.
Maybe a great deal of interest exists, but priorities, starting a new "project" may not be on the horizon for Staff.
@RMario...maybe email Lichess to bring attention to the demand for traditional formatted tournaments.
Maybe Lichess could email all it's members, asking for feedback, and evaluate the response.
We've discussed how a Swiss Correspondence Tournament is a good staring point. I wouldn't expect this to require a great deal of set-up for developers, and would require only a volunteer member to monitor.