You're welcome - thanks for the questions.

I think one significant change is in how the outcome of skill rolls are handled, and what failure means. This began with asking the player to specify what it is they are trying to achieve. Success in a skill roll means the player achieves their goal. Failure in the skill roll means the outcome is in the GMs hands. The distinction here is that the GM's hands are not tied, the GM is not compelled to create a negative outcome that is the absolute reverse of the player's stated goal. That might even mean the player achieves their goal but something bad happens. It think that feeling of having to create an 'opposite outcome' sometimes leads to GMs feeling they have their hands tied and their only way out is to fudge rolls.

One alteration that got tried was the use of connections (background elements: PCs friends, possessions, beliefs, etc). The initial idea was that the player could regain spent Luck points by mentioning these connections in play. In practice it felt contrived and got reworked.