Is Graves shit now?

The answer is no. He just feels useless later imo. I usually wreck early game, and can't actually get up close later, because I get bursted. However, if you position correctly, you can still easily kite and burst people.

Yes and no. It's all completely dependent on how you play him. If you can keep your positioning really well with him, you'll shred everything. If you fuck up and get too close, you'll probably die near instantly.

Timing your shells, your E, and when to use your Q is one of the biggest factors of playing him. If you can't time them correctly, you'll waste a dash, or miss with your Q, and a large chunk of your damage will disappear.