I've been looking forward to implementing this system for a long time. Dunno why I didn't volunteer to do it sooner (actually, I DO know. UI scares me).
The toggle option is definite. Changing interactions so radically (from one click to two for almost any action) is not something we'd thrust on players lightly (even though I think it's the best idea all-round).
I hope I wasn't too disparaging of keyboard users. I think my way of doing things is actually a little silly, but I like leaning back and navigating with a wireless mouse, y'know.
And yeah, I was pretty sure that people would be pleased about the misclick prevention as a side-effect. But please, we've already had enough heated discussion around that area.
But very good point, Avatar, it actually makes a lot of sense to marry this new system more tightly with keyboard shortcuts. Dunno how quickly we'll get around to that, but since the radial menu is a focus in the coming weeks (wanted to deploy it today, but it wasn't quite ready ...) I suppose we'll be thinking about it.