Albinis involvement or not In Utero is by no means better produced than Nevermind.
And Nevermind is actually my favorite Nirvana album. I know people hated it for the same reason Cobain wasn't true proud of it, the very polished production.
Me personally, I'm a whore for polished production, and putting that aside, the songwriting on Nevermind is a hell of a lot better than that on Bleach, I don't care what anyone says, Bleach had a few throwaway songs, and Nevermind only had one, Territorial Pissings.
In Utero while having better songs than Nevermind, also has worse songs than Nevermind. Overall Nevermind is their most consistant work and thats why its my favorite.