That would honestly be a pretty good pivot. The trouble with Gab and Voat is that if you only bill yourself as a "free speech alternative," you get almost-exclusively populated with the sorts of people who have to worry about that (i.e. fringe characters). The community becomes strongly influenced by the "founder effect" of the digital refugees that made up its founding stock.

It would be interesting to have a sort of two-column format, where one column is who you normally follow, and the other column is an auto-generated list of people in the most opposite social-graph cluster.

The lifeblood of places like Twitter is the ability for people to get into loud arguments that people feel matter more than they actually do. If Twitter ever actually did a full purge of one side of the ideological spectrum they'd find a massive decrease in interest. People want to fight deep down and so need the other around.