This is a rather pointless update but whatever lol.
Nintendo has added a minor update to Miiverse on the Wii U. In order to create a seamless correlation between the social app on the 3DS and Wii U, the Y button will now refresh the page rather than the Wii U GamePad’s L button. There’s also a new feature added to Miiverse, which allows for quicker movement between posts. Using the L/R shoulder buttons on the GamePad will provide speedier access when scrolling up and down posts.