No fix? Sith got to be kings for a year, it's our turn?
I do not see the issue being one of overall dominance. The issue, in my view, is that if the deck combos out turn one then the game is over, pretty much irregardless of what the DS has or will play. The high end of that combo takes the game out of the game. That would be a problem even if the deck wasn't reliable. That the combo is part of a real deck, just makes the issue more apparent and pressing.
No deck should be able to all but wrap up a game Turn 1 based solely off of if it can draw certain pieces.
Make Dash or Freeholders 'one per deck'?
Errata need to do two things. Solve the issue and do so with the least collateral damage. This would solve the issue, but would also harm those sets usage in decks that aren't problematic. This seems to broad.
Make Freeholders non elite?
This likely doesn't solve the issue and again just hurts the cards playability in decks that aren't a problem.
Limit Holding all the Cards to one per turn?
I think this is the strongest candidate. It prevents an unpreventable turn 1 combo, while not overly hurting the set in other usages. It does hurt the Dash home runs, but he's still a strong unit. Holding would still have it's uses with Dash, Against All Odds, and the Freeholders, but you wouldn't have the high end Turn 1 combo issue.
Make Holding all the Cards Limited?
Doesn't solve the problem anymore then the last suggestion, just makes the card strictly worse.
Give Freeholders a max to the discount (like always costs at least 2 or something)
Again a strong candidate. Even with just a cost of 1 you limit the absurd abuse you can see with this unit.
Make the Freeholder objective a forced reaction?
If the Trust Me ruling gets reversed False Report is no longer an issue.
Make Dash's objective Rebel or Jedi affiliation only? (a little extreme)
Quite extreme, you can do less and likely yield a better outcome.