Hmm, this is some ludicrously interesting timing. I'm a newcomer to the series and literally just finished the main storyline of The Third on Monday... same day as the announcement.
A few Googles about a mission reset option/tool led me here, and now I'm finding myself applauding IdolNinja and the kind folks at Volition for enabling/supporting this. Seriously though -- how many folks at big game studios these days would go out of their way to lend a hand to the modding community? A step above and beyond, that.
So yeah, mega-success and kudos and things! Just had to reg an account to give the thumbs-up, if nothing else. No guarantees if I'll stick around, but I've done my fair share of modding for other engines and might try my hand at tinkering around with a few things when the time comes. Because why not?
Oh hello Xaser, fancy meeting you here. :O