There might be no good solution. In that case, you can still implement the least bad solution, but it's better to know that it's merely the least bad, than to fool yourself into thinking it's good - in particular, knowing that it's not a good solution should make you more open to hearing other ideas.
BlueSky is already quite bad like old Twitter, though not like X. It's not filled with Nazis, but it is very bland and corporate with no substance.
But even after they flee, it won't be enough — the new platform where they took refuge, having become popular, must be stormed. Any room where the marginalized congregate must be filled with the din of hatred. In short, it is not enough for Musk-era Twitter to be Twitter — BlueSky must also become Twitter.