One other thing I'd noticed in this game too: it seems rather easier to stealth through than in previous games and it's possible (even preferable) to rely almost wholly on augs and cover for stealth rather than weapons.
I don't think I tried a full stealth run of the first DX, despite playing through the whole game three or four times. As I remember it, though, it would have been very difficult in places.
In HR, I did a Foxiest of the Hounds + Clean Hands playthrough but used my non-lethal weaponry quite extensively.
In MD, I'm now nearing the end of Golem City and (apart from the tutorial, when I didn't even realise which augs I had) I think I've fired my tranq rifle twice and my stun gun once. Other than that it's been all augs and takedowns - and it hasn't felt that tricky to get through it this way. I kind of like it, but it does make me wonder why I'm lugging around all this weaponry and ammo...