I largely agree. Biden should be out/only every day being seen and being heard. There are likely a lot of people buying into the "Biden's old and infirm" story. If it's not true, then have him out there all the time - even if it's just appearing on Conan, Tonight Show, etc to make jokes and seem likable - it makes people realize that he's actually alive.
Right now all you've got is Trump being covered 24/7 and the other guy, who only pops his head out occasionally. He needs to be getting covered talking about what he's going to do - not just who he's not - to sell himself as a good choice, not just the less-bad choice.
It's like with sports - it seems like he's playing not to lose, rather than playing to win. We know what happens when a team settles into a deep zone and blows it by letting the other team march the ball down the field.