The article is great, and one that really puts thought to word about much of how I go about my own collecting (free word of advice: stay away from the "Let's See Some Cool Stuff" thread if you are really on a budget).
One thing that I found myself nodding in agreement each time was your reactions to each of these figures.
KFC [Citizen] Stack - cool, but not quite "Masterpiece". Even more to the point, "Citizen Stack, to me, felt like a really beautiful and large toy not entirely different from the vein that Generations Metroplex exists in, as opposed to a Masterpiece-style high end collector’s item." Yep, I couldn't agree more. Ultra Magnus is a fond character/toy [to] me, and even if something doesn't "fit" a line, I can find myself wanting it. Citizen Stack is just that.
Warden - Again, your own words were my reaction: "He isn’t for everyone, though, if you need to transform your toys on a regular basis with ease and don’t have any sort of connection to IDW Max, then maybe Warden isn’t for you." A local collector friend (Scotty P!) got one, and while it's a cool thing, it's just not for me. If someone wants a full IDW cast, I can see it. I do not.
MP-10B - It's basically G1 Scourge (from RiD). I've not seen a photo yet that does it justice. It's one of those that's so much nicer in hand.
(My MP-10B Black Convoy unpacking on Christmas day, 2013!)