Those who follow me at rosstraining have likely read some of my posts about hand-eye coordination. One drill that I’ve referenced before is to strike a tennis ball that’s attached to a hat with an elastic cord (ex. here). The drill has become quite popular in recent years. World champion Vasyl Lomachenko is one boxer who is often seen using a similar device. Many actually believe that he is the first boxer to use such a tool.
The drug problems in boxing won't go anywhere until tougher penalties are issued. Unfortunately, the puppet masters who run boxing care more about bank balances than the integrity of the sport. If a fighter puts asses in seats, he'll always find his way back to big shows.