The Gedolim who banned it apparently didn’t like some of the things mentioned about Reb Aharon specifically, which apparently they had been told about what it said. I believe there was another Gadol as well who had some comments, which weren’t appreciated. I believe they considered those maasim to show lack of kavod.
My personal suggestion is to ask one of the Rabbonim who make those statements in person to get a clear understanding of what their opinion is, and abide by it.
My brother specifically asked Rav Sheinberg about the Shteinsaltz Gemoras, and he told him what was inappropriate, and why he banned it.