I think that having multi-chain operation is probably the easiest solution, with options for choosing where things post (e.g. a dialog box) before publication.

Hive looks really great, and I'm excited to see the decentralization brought closer to fruition with some honest safeguards. Still not perfect, but it's a great step better than Steem with its known flaws.

I could see staying on Steempeak, but honestly I wouldn't prefer it over a new thing.

My two URL choices that seem obvious: peak.network has great appeal across the board, with anyone getting exactly what the point of the idea is. dpeak.io is also interesting, though I think it could be offputting to people who don't understand the ecosystem already.

I like the idea of Steem keeping its principled witnesses, but I don't think that's possible for a number of reasons. If you switch to Hive, I'll go with y'all.