It may be, but I don't believe it.
DPoS was chosen because Dan Larimer had previously created Bitshares (who operated on this consensus system).
Remember that it is not for you to decide which consensus system will work. It will be done by the Witnesses who you want to deprive of tens or hundreds of dollars a month. That's why I don't believe we can change anything
Steem is not going to adopt PoS. That's not what I meant. I meant the other measures you suggested.
I think a bridge to do two-way swaps between the chains would be a good thing. Any two chains should be able to connect that way.