Clutch questions

1. Clutch release assembly #6-8 does look shot to me. See wear on races. Should this be replaced and if so, any good aftermarket? Any advice?

2. Steel ball. I had only one goes between rod and pusher. This agrees with parts fiches. Should there be a ball between clutch release and rod?

3. Pusher, #23. There was some graphite grease on it. What is it? Should it be there and what does it call? I also saw some aftermarket pushers with bearings. Yes/No? Is stock sufficient?