Coming back early like he did IMO was actually a red flag. Achilles injuries will frequently have a career altering effect on a RB. It is not uncommon for it to take away the player's natural explosiveness in their running style. I don't think it's his vision as much as his inability to run in the same style as he used to. The power and explosion he had originally is gone and he must change how he runs.
IMO if Akers wants to stay in the NFL he must change how he runs, i.e. how he plays the position. He only needs to look at Kupp for his answer. Kupp began an unbelievable training regime that increased his speed but also his power. Kupp is far more buff than he was as a rookie. It's clear his core strength is tremendously improved. Kupp's speed is nothing like he was as a rookie. When he turns on his afterburners he can fly. As a rookie Kupp timed at 4.62 in the 40. Recently Kupp was timed at a little over 20 mph which would be in the 4.2-4.3 range!
Akers would need to emulate that type of training regime and change from a shifty speed runner to a fast power runner. That type of transformation will take probably 2 years, but Cam is a young man. He's got the years to do it and still have a productive career. But it's going to take a complete change of attitude and not everyone can do it. Kupp proved it can be done, it's just a matter of whether Akers has the mental fortitude to make it happen.
Otherwise, his career will end up as a FA backup level player for the remainder of his productive years. As he is he no longer has the agility and burst to take advantage of those holes he's supposedly not seeing. In McVay's mind he's damaged goods which he is. That said it doesn't have to be permanent if Cam doesn't want it to be.