The QR Codes looks very handy. I'm just concerned about everything being put into regular sized blocks. This is great for websites that are only on Desktops but for people trying to create mobile sites/apps we need smaller blocks. If we had blocks that were half the size of regular blocks that would save space to add more content
The QR Code image occupies 100% width of a block it is located in. So if you have smaller blocks on your site then the QR Code will be downsized to fit 100% in that block regardless of a block's width.