As long as anyone claiming independent sticks on Bus are problem does not support the claim with some verifiable research, I'll consider such utterances unreliable & irrelevant.
Well, Otelli's publication, the PM article are somewhat verifiable research, in the absence of the still withheld evidence of the same by the BEA (just wonder why ....).
So it really starts being quite some evidence, if one cares to read correctly.
You can all continue to play the ostrich, which only suggests that the brain mass might be equivalent, or there must be some other reason!
But to me the lines in the PM article are horrifyingly evidence enough that independent controls are a distinct disadvantage to coupled ones. The latter would have most probably triggered a very much earlier reaction of the PNF, ......, and most probably have saved the day for those extremely poor pilots.