Don't forget that the original S5 had serious issues as well, as did the V2 (though I know you liked it), and last but not least, the new A3 which has been described internally among us as a piece of junk.
Yes, Magico speakers seem inconsistent. I did not like the V3 for instance. But the M3 is their flagship line with the latest technology and it costs $85K or something. Given that, my expectations are higher. The A, S and V lines are/were clearly built to a lower price point with compromises in place. The A3, V3, S3, S3 II, Q3 and M3 are all in this mid size, full range category, but they are very different designs which sound different.