How about movements where weight is dropped/sunk, or where movements are rising and floating?

those, medulanet covered. (or if he didn't, he would have )

drop (as in dropping height from walking stance to horse stance) usually when throwing or taking to ground. also, unbalancing. dropping while already having someone in a precurious position, sometimes is indicative of a break. for what we do, usually means the neck.

sink (as in projecting mass down into target), for off-balancing and shock impact during strike. also sinking can be used to tighten a lock hold.

rising - bash threw into an attack. also, rising then dropping while turning and throwing (like a corkscrew into the ground)...and the throws aren't nice.

floating - anytime when you are using another force to counteract for stabilty - in aikido for instance, they use sophisticated methods of centrifigal force in 3-dimensions. similar thing, but less complex in what we do. but then you listen to wristtwister, and his karate likely has more utilization of this...depends what your art's influences are. I will say this, whatever art people do - drawing principles from other arts will likely awaken hidden principles that you didn't see before in your primary art of choice. ...plus it's more fun. screw tradition. lol Arts aren't meant to be stagnent...when they are, it becomes ritual.

anyone doing a kata-based system, trying to figure out application.... the answer is in Chinese arts, koryu Japanese arts, and non-sport grappling. If each application wouldn't seriously mess someone up, then keep working on it and keep looking.

stepping back, blocking and striking then resetting, is one-dimensional and completely misses the point of kata.