Erik
I've heard live concerts of Zweden/SPO and can testify that there are pros and cons in their collaboration. Whenever they play large scaled repertoires like Bruckner, Mahler, or Shostakovich, they seem to be in a fine shape, but when tackling more classical programs, e.g., Beethoven or Brahms Zweden pushes the orchestra to their limit and the result could be mercilessly out of shape and out of synchronization. It seemed that at times SPO just couldn't catch with the brutal pace and dynamics their MD asked for. On their recordings of M1st I can hear some trace of this issue: the coda of IV moves too fast and wild for the SPO players to feel comfortable. The sonics, as you mentioned, are another problem here. Hopefully, their M2 will be better^
John