If my memory doesn’t fail me, what we gathered from both interviews and Cuatro is that the production process there was quite different. The band almost self produced those records, when the recording started Cavallo took the demos and probably acted a bit too much as a yes man doing some polishing but not really steering them in any direction. I remember a bit of Cuatro where Cavallo essentially say that the tracks where so good that he didn’t really have much to do. And well, maybe that was not necessarily true for all of them. Maybe he actually believed that, maybe it was a time/budget constraint due to the amount of songs. Who knows.
I would definitely love to see a good music journalist that knows the band interviewing them about those days. I’m pretty sure if asked the right questions in the right way they would have many things to say about that era that we still only partially know.