Doublestrike, first let me say this... wow! This looks to be a huge leap forward in Forge's evolution.
A couple top level observations:
1. The Old Gui checkbox isn't saved between launches of Forge
2. Whenever the New Gui is being displayed, the CPU is pegged the whole time. As soon as I close it and go back to the home screen, the java process settles back down.
New Gui observations:
1. The stack descriptions are incredibly hard to read by default. Maybe we need a different font, default the color to white with that background, something.
2. The Message Box area (Turn info, targeting prompts, etc) doesn't wrap text broken at the word. It will wrap in the middle of a word
3. The phase indicators for each player should be bright for the active phase, and the rest dark. Currently, the active phase is dark, and the rest bright. (And I'm not sure I like the green. Maybe the color of these will be part of the skin?)
4. Closing the battlefield (via the window decoration) show bring up the GuiWinLose thing as a Concede. (Or at least go back to the home screen.)
5. Creatures should be on top of lands in the battlefield layout. Currently, my creatures are below the lands.
6. Insignificant, but I kind of miss the animated draw (how the card flies in instead of just shows up).
That's from playing one regular match.
Overall, bravo good sir!
-slapshot5