I think Keaton's pose in B89 sort of tips you off to how incredibly immobile that suit was. To look to the side he has to sort of bend at the waist and twist around. Yeah, it's perfect for standing still and looking imposing, but I remember seeing B89 not too long ago and watching him run and this big rubbery cape flapping around and him sort of stomping forwards. Not to mention every time he got hit in the face or had to move it would all of the sudden bend and twist around his face, folding out so that you could see massive gaps. It looked really, really awful to wear.
I'd say that comparing the way the new DK suit looks and the way the older suits look is sort of like comparing a modern latex condom with a rubber one from 1978. Yeah, maybe it was the first time you used one and so it has a special place in your heart and you like the feel of it for nostalgic purposes, but come on, there's so much more fun to be had!
Also, wow, the abbage looks silly. Them biscuits look like freaking lava formations or something.