MLG operates MLG.tv, the #1 online broadcast network for professional level competitive gaming; the MLG Pro Circuit, the longest-running eSports league in North America; and GameBattles, the largest cross platform online gaming tournament system with 9 million registered users across the globe.
Keeping the Surface Connect port and making the Surface Dock compatible with the Surface Pro 3 in the process instead of replacing it with a symmetrical and reversible USB-C port is a tradeoff I posit Microsoft thinks is worthwhile at this stage.
USB B (Device). Also called the upstream connector, the Type B USB connector is more box-shaped and is the end that attaches directly to the device (such as a printer or digital camera). USB 1.1 specifies the Type A and Type B.