Aaah, Alternate history, a favourite of mine, might I recommend
http://www.alternatehistory.com which has some nice little timelines written on there.
So, POD is the Naval Mutiny...let's see...well, providing that all ships decide to follow the order, and not all of them might, it's going to be a fairly bad time for the German fleet. The British Grand Fleet was in a better state than at Jutland, it had identified most of the problems that afflicted it during that battle and had worked to neutralise them. It had new weaponry available to it, including ship bourne torpedo aircraft and the K-class submarine which, providing they didn't break down or sink themselves, were faster than any other submarine at the time. Morale in the Kaiserliche Marine wasn't particularly high, as the mutiny would prove, but the Grand Fleet was brimming with expectation for a rematch to right the wrongs that took place at Jutland. I may not like Beatty much (I'm a Jellicoe man) but he could certainly work up morale.
Of course there are many variables to consider, but the High Seas Fleet would have been severely outnumbered by the combined forces of the Grand Fleet and Harwich Force and in the largest naval battle the world had ever seen, it would have been savagely beaten until it was either forced to withdraw, or had been annihilated.