The notes for WW's submissions are all the same after line 84.
I had no notes for my kingdoms because I wanted them to speak for themselves and I'm quite a bad player compared to a lot of folks around here so I'd probably be way off the mark with my analysis. I submitted one "serious" kingdom with what I thought was a lot of different strategic options due to lots of good cards and combos that would require completely different setups and one "fun" kingdom where the path to go was pretty obvious but I thought would lead to a rather non-traditional game and was rather surprised that the second one made the cut for the finals. Since my other submission used all sorts of ideas that came up in various other ways in the finalists, I really had no idea which sets were mine until theory sent me a PM (which I didn't even read until after I had made some comments about my own submission - oops!).
It started out as all green cards and no actions, but that looked really lame. I knew some actions would be needed to make the game interesting so I cut the green cards that really didn't do anything and added Crossroads, Baron and B-crat since they worked specifically with green cards in some way. Loan was added as a cheap trasher that didn't use up an action that helped fuel Baron/XR by getting rid of unneeded cards; with Baron for cash you need not get any Silvers, although it would potentially conflict with Harem. It also conflicted with B-crat (I can't recall if I knew that when I submitted it though), an attack that I thought would be extremely strong on this board given the dependence of deck on XR drawing. Apprentice was the last card added, and was just a comedy option: a normally strong card you probably want nothing to do with on this type of board. It might be useful to help jump-start XR after being hit with B-crat a couple times, and if you had your own B-crats it would would have a source of fuel, but was mostly a joke.
As to the exact mix of green cards, and the lack of Scout, I can't really say much because it wasn't really well thought out. I'm guessing that if I had taken more time to consider each card like I had for the more serious set I might end up with something even more popular, but who knows? I certainly did something right, but perhaps the eclectic mix of cards without any obvious reasoning behind them appealed to some people more than the highly calculated submissions of others.