It's so funny how different people can have such different perspectives on the same piece of fiction!
Interesting stuff. Random thoughts about it:
I didn't pick up on the gas thing at first, so I guess I can't possibly call it obvious.
I thought his scheme was plenty realistic, but to each their own there. Most importantly, though, I think he's obviously a pretty similar character to the Ben we all know. Clearly, whoever these Flash-sideways people are, they have an awful lot in common with their real-world counterparts. I feel less attachment to them, certainly, but not none.
Also, wouldn't those two issues kind of be at odds with one another, anyway? If it's a problem that it's harder to relate to them, how it can it also be a problem that they're mirroring each other more? The latter would seem to help with the former.
Re: subtle. We'll definitely have to agree to disagree here. I feel it was about as subtle as we can expect, given that they are trying to show us a mirror of some kind here. I'm not sure how relatively subtle some of the flashbacks in earlier seasons were, really, but either way a lot of these characters are reaching the very end of their arc, so it seems fitting that these things are not just influencing current choices, but basically embodying them. And, again, they might
have to be blatantly related, depending on what the Flash-sideways' even are.
Re: Year Zero. Yes, we're seeing that this world's differences go further back all the time. At first the implication/assumption was that this is a world where flight 815 lands, but we quickly learn that it has other differences which predate that. And with the revelation about Flash-sideways Ben leaving the island (almost certainly pre-Incident, if the Incident still exists, of course), it must go further back still. I think the idea that the Flash-sideways world is a Jacob-less world is a pretty decent theory. I do think the show is toying with us a little, though, and that Jughead probably didn't do anything they intended it to. It's kind of a silly plan (even for
Lost), anyway. I think we'll probably learn that the actual cause of whatever Juliet said "worked" is them stopping Dhrama from drilling into the pocket of energy, and not detonating Jughead.