In your list you cut Valiant Changeling right? I wonder how much that hurt the fair beatdown plan in disruptive games. 3/3 double strike is a clock and payoff for the 1/1s. Otherwise you rely a lot on Magda and Grist, or adding another payoff.

You can't play Chalice, but you can play Daze.

I think lord effects (e.g. Lord of the Unreal or Master of the Pearl Trident in a blue-centric base) would make the 1/1 changelings better too. Another option is Patron Wizard, even as a 1-of, which would give instant speed stack interaction.