I have created a few custom presets which now are available in the My Presets tab of the New Document Panel. I've noticed the following behaviours, which I think could improve:
After starting AP the Web tab of the Presets panel is showing by default. To me it makes more sense to show the My Presets tab by default, as soon as there's at least one custom preset.
I also noticed that, when you navigate to the Templates vertical tab from any of the horizontal tabs (My Presets, Print etc) and then go back to the Presets vertical tab, you will see the Web tab again. It would make more sense to go back to the tab you came from (in my case My Presets) or, if this is not possible, back to the My Presets, which is the first one anyway.
I also noticed that, when you collapse one of the sections on the right hand side of the New Document panel, it's no longer collapsed after a restart of AP. Would be nice if this could also persist.