If you were to watch Grian's video showcasing the cushion and what he says at the end of the video, I believe in what he believes in. Do not get me wrong, cushions are cool; I just foresee them being overused in building, which I see as lazy. For example, I primarily build in the military community, in which I build tanks, planes, ships, etc. Shaping is one of the most important things with that community, and I have already seen builds with the entire thing pretty much being cushions. A few is okay, but a majority of the build is just one block. I, personally, think that is a lazy way of building and ruins the fun of Minecraft. Minecraft is meant to be creative. Spamming one block because it can do a lot to me is not creativity, and certainly not what Minecraft is meant for. Other uses for the cushion are great, and I encourage it, but the niche I build in I see as a lazy building device rather than something super positive.