Don't think he wasn't inaccurate. I always thought Ariza was one of the more genuine people in Manny's corner as well as Michael Moorer who was in Pacquiao's corner vs Hatton/Cotto and actually teaching Manny some defense. I remember watching those 24/7 episodes and out of nowhere Koncz and Roach started to grill Ariza which I thought was kind of awkward considering how great Manny started to look.
Here's the thing, Freddie Roach is a strong trainer when it comes to teaching his boxers how to punch. Dude got exposed as a trainer and has been exposed in the past.
When Manny was in the pocket vs Floyd is when he had the most success, I'll even say that's the most uncomfortable I've ever seen Floyd in the pocket. Even Floyd said he was surprised how effective Manny is in the pocket. But when Floyd switched it up and found that using footwork was better for this instance, Manny and his corner should have told him to start cutting off the ring and force Floyd to try and find another answer. But we saw what happened, Manny just ended up trying to chase Mayweather. Any decent trainer would have prepared for Floyd to start running and work on technique to start cutting off the ring.
They honestly piggy-backed off of Manny's name and natural talent for the last 6 years. Manny could've been a beast with a different trainer the second half of his career.