The Oware is interesting because it is a basic pyramid. No frills, it requires skill to use it in the back country. You will likely need a piece of netting over your heads and a ground cloth. This is not included in the weight.
The Luna 6 is a pretty much the same except you can add on a floor and mud skirt. Not a real lot of difference between the two other than being able to add on at the “factory.” The name is a misnomer, though. 6 in a pinch, 3 is more like it.
Pyramids often have leaky edges & leaky doors and they have sloped walls around the entire perimeter. They also have a center pole that takes up real estate making them hard to portion out space. When opening the door, you expose the inner area to the weather. If you have a sewn in floor, they are difficult to set up, and subject to getting wet very easily. Around 30-50% of the interior space is wasted in rain storms. Everyone wants the center, back.
If the tarp starts leaking or misting, simply coat it with silicone caulk and mineral spirits. I usually plan on this by the second, third year or often out of the box with the new 1.1/1.2oz/yd silconized nylon. It seems they scrimp on coating to save weight. Pyramids and tarps are subject to stretching around the poles, usually reinforced because of this, but may require extra attention to sealing.
Is cuben(dyneema) worth it? Up to you. I don’t think it is with larger tarps/pyramids. For solo shelters, yup. Anyway, you are talking about 15-20oz per person. Not real bad. If you go for a net tent, something more than that.
