I believe they said they'd bring the most anticipated feature from PoE2, and while Reddit made jokes they're actually porting Sprinting to PoE1 to replace quicksilvers, I think it's pretty guaranteed it'll be trading, that said it could be delayed if they ran into issues but otherwise it should be a safe assumption.
As for dump tabs, couldn't you price a whole tab in PoE2 with the new trade? I thought it was an option, just have to be a lot more careful about what you dump and where since it'll sell in 10secs if you fuck it up. But maybe they didn't make it, I think that's the kind of thing they'd work on as an additional feature once they get the stuff working right though.