It's a chicken-and-egg scenario. Honestly, until last week this line wasn't playing much better than last year's line.
I remember there was some guy named Tom Brady who, despite being a God on Earth, looked surprisingly mortal in the two Super Bowls where he had pressure in his face all night. Last time I looked that guy played in eight Super Bowls, and DeShaun Watson and Carson Wentz were coming off torn ACLs and "not looking like themselves."
Eli's skills have definitely declined, but I'd still take him over about half of the QBs in the league right now. Let's see what happens the rest of the way. But yeah, he's going to look like shit if you don't give him some protection.... just like that Almighty Deity Tom Brady.