Step 1: Get rid of the Virus
Agree with all of those except the second one.
To me the way to revive E3 would be to have Nintendo give presentations on stage again, make it easier to attend, and focus less on CGI trailers and financial numbers. I don't think any of those things will happen. E3 should probably just die at this point.
I wish Nintendo did presentations on stage again, provided it doesn't kill Nintendo Directs.