My beats x failed recently. Wire broke inside which cause intermittent connection. This is a common issue. Won’t be buying another pair until a new revision is released.
4. Shorter overall cable length. IMO it is way too long now and could be at least 6 inches shorter. I don't need droopy dog ears hanging below my ears.
5. More useful case. I have a hard time twisting the Beats X into a small enough package to fit into the pouch. So instead I usually just leave the earbuds in the pouch and leave the rest of the (too-long) cable outside in my backpack. I haven't tried very hard to find a pouch that works better but I have no doubt at least one exists.