Loads of possibilities - but informing us of stuff that has been implemented for some time just sort of makes Google look a bit incompetent - IMHO :)
Your current learning tools are apparently too vague and ambiguous for a mere mortal, like me, to figure out. I've implemented every point that I can pinpoint to my best ability and still penalized for low QS.
Funny thing is that if someone told me what was triggering the problem I'd probably be able to fix it in an hour.
And a message telling me how stupid I am.
See, I'm not that stupid since I already know I'm stupid.
Too bad we can't buy off a Googler and have them spill the beans.. They are all too rich.
Any real information would be better than what we have.
Obviously details wouldn't help the MFAs since a lot of them already know how to beat the system...just create a new domain every couple of weeks.
Those of us with a real businesses and a real customer base can't do that.