I am full aware of the changes:
1. Less range means less braindead full screen stein spam. It's a nerf for sure, but for some characters, it helps balance the match a bit.
2. Slower startup allows for better/safer pressure/mixup. It opens up new combo routes and as pochp stated earlier, if you want to do unsafe things (yomi DP), it should be safer now. I can also see nasty ways to hide 6B gatlings in as well.
3. Running away with steins was one of the biggest complaints (along with 5C range) that players made about Mu. Goes back to that whole using your brain to set your steins.
4. Seems to me you can now set up oki with J.2c with this. Not really sure why you consider this a nerf. Unless of course, you just want another avenue of playing runaway stein.