Using scrypt(N, 1, 1) means that only solo cpu mining will work until someone will fork mining pool software or implement GPU miner. All existing miners (cpuminer, cgminer, reaper etc) aren't compatible. Yacoin Qt-wallet or daemon are to be used for mining.
The core idea is that we have to use and to try different hash algos to make cryptofinances more secure and stable.
This is a very bad idea. You have just introduced another litecoin cgminer gpu catastrophe
I would not be surprised if people, maybe even many people independently, have forked and created their own cgminer in secret which is capable of utilizing GPUs, giving them several order of magnitude advantage over everyone else.