I don't think Amerika'z Nightmare is that bad, like The Source & XXL I also think it was a sleeper album. By no means was it the best or even in the top 10 of 2004, but Im thinking people disliked it because Mobb Deep used their regular and old method. Grimmey thug music, the problem was that the production wasn't as strong as it couldve been.
Sarr, Prodigy IMO was wack as fuck on "A.N.". Havoc carried that album and I wouldn't want to see Alchemist produce an entire or a majority of a Mobb Deep album because their collaborations would get played out fast. Keep it moderate and occassional.
peace.