I don't think that RYO has made any mistakes. I've been following this SUMO-RYO war from the very beginning and, although I don't think that all people in SUMO were deliberately doing things wrong, many did. You don't have to take my word, just read for yourself their respective reddits and it's all crystal clear. There have been some people hiding information, even after being pointed out that flaws existed, and other people that have brought it to light. People that are trying to build an heterogeneous distributed network, and people wishing to concentrate mining on a few powerful bunch. Some people that decide to fork without leaving time to achieve a consensus about it, and others that are forced to fork to escape from an all-ASIC network.

To me, that fireice_UK and psychocrypt landed on RYO is the best thing that could have happened, we'll see what time brings but I have high expectations !