I think that suggestion is a far "happier" ending than will end up being the case because it would leave Walt accomplishing his initial goal - providing money for his family after he's gone.

No,not a chance.

My take from this episode was that Tate got his information about Gina from texting with Gus while impersonating Zina.  That still would have required Tate to stake out the police station and track Gina leaving with Sonya and Hank, which is a sequence of events with its own plausibility problems, especially because…

I concur with beema about the "omnipotent serial killer bullshit."

I concur in general with your take about leaning too much on the "omnipotent villain".  That said, in this case I thought that maybe Tate put a tracker on Sonya's car at some point, possibly prior to this episode - clearly an idea that Breaking Bad put in my head.  He still would have had to stake out the police…

I think Molly means something other than "class" in contrasting Charlotte and Linder, more like "wealth" or "life choices". Charlotte was a hostess at a Tampa restaurant until she married her rich husband a few years ago, and it's made clear on the show that she wasn't always wealthy and doesn't fit in with the…

Bob Odenkirk has said that it would probably be a prequel

Lydia made Walt swear not to harm her "on his children's lives" and has brought up that point at least once again. I foresee Lydia going after the rest of Walt's family at some point.

Thanks.  To be clear, I also like the show.  I think those 2 aspects are areas where you just have to suspend disbelief and move on, though.    
FWIW, I've not seen the Scandinavian original, but a commenter here said a few episodes ago that the implausibly omnipotent/omniscient killer was also a feature of the…

"Marco’s father started the cartel with Fausto’s father back in the day."
I think Molly overstates this one, because that's a lot more than I took away from that conversation.  Fausto's father and Marco's father conducted business together, and it was clearly business of an illegal nature.   It could have been as…

Yes, it does help with the Sonya/Marco partnership, but that's also why it's absurd that Sonya was working investigations by herself as an El Paso PD investigator without a partner.  She should have always had a partner who would handle those interpersonal aspects of the job with witnesses, suspects, and next of kin.…

They do if Ray's trying to purchase fully automatic weapons or guns with the serial numbers filed off.

Based on how Sonya deals with people, she would ask him those exact questions in an emotionless monotone.

A decent explanation that I've heard for that one is that Mike has consistently underestimated Walt because he doesn't respect him.

I think that the other end of the M60 will be some sort of criminal organization, be it Lydia and crew, Todd's uncle and the Aryan Brotherhood, a revitalized Mexican cartel back in the picture,  Declan the Phoenix meth kingpin, or some combination of the above.

I agree, the whole point of dealing with the Czechs is that they don't even know who Walt / Heisenberg is.  Declan has met him.

I agree. Going all the way the back to the killer taking down the border electronics in the first episode, LE (or former LE) make the most sense.

"Karen's failure as a commander"

Were Walt's underwear Fruit of the Loom (which is owned by Berkshire Hathaway)?

Berkshire Hathaway is very probably the only real-life conglomerate - at least outside of Asia - with interests as diverse as Madrigal Electromotive.