No, actually BGS' direction for Fallout is excellent because they are expanding on the original works. If not for them spending millions of dollars and years of work, Fallout would still be dead as it was when they acquired it.
See, the problem with claims like the one above is that they are stated as absolute universal truths rather than simply personal opinions. In other words, the above quote states unequivocally that the original "legacy and lineage" of Fallout "may as well be" dead. No, not true at all, merely one (minority) opinion, at least if we judge the original Fallouts and their reception in sales and critical success versus BGS' continuation and expansion.
Falout 4 is certainly not "tenuously (at best)" an ancestor. That would be impossible, obviously, since Bethesda owns the rights and is expanding on the original, extremely limited concepts presented almost two decades ago. From everything we have seen and know about FO4 so far, it is the best installment to date. That could change once the game is played by us, of course, but that's how things are right now. It certainly makes the original games look extremely bad, and I am not talking about the graphics.
Your view of BGS' Fallout 3 is certainly not the minority, but rather the majority. Very few people think that Fallout 3 is inferior to the original Fallouts. We can see this by both the general market success of the game as well as its critical reception, and the fact that its success (far greater than FONV) has enabled Bethesda to invest the time and money to continue the franchise, unlike the lack of success of the original games. I'm not sure why you would think that your view is the minority unless you are only considering the vocal minority of original Fallout fans here and a few other places who complain about FO3 while raising specific points that are not even valid complaints, particularly when FONV has the same elements with far worse problems. Like anything else, vocal minorities are simply loud, not the majority. If the majority enjoys something, they tend to not say anything at all, but the actual results (sales, critical acclaim, etc) show the majority's viewpoint. The only way this would not be true, at least in any capitalistic system, would be if a minority of people who were extremely wealthy were able to skew the demonstrated results via their wealth (e.g., buying millions of copies of something, bribing critics to offer positive views, etc.).
To those who claim that people who look forward to Fallout 4 are hopelessly optimistic while the complainers, ranters, etc are offering astute pessimistic criticism, give me a break! The vast majority of positive posts for Fallout 4 that I have seen here and elsewhere are evaluating it based on what has been shown and the fact that the game is FINISHED aside from squashing bugs prior to mastering for retail sale. They are not praising anything that hasn't been shown, unlike the complainers and ranters. In fact, some of the positive posts offer personal preference criticism of elements that are in Fallout 4 that they'd prefer not to have such as voiced PC (which the lack of hasn't made sense for almost two decades, but anyway...). In other words, even optimistic posts have offered personal criticisms and have certainly not been purely hype, positive acclaim, unlike the complainers and ranters who have only criticized things that have not (and could not have) been shown such as multiple decisions, story, character development, consequences, etc. The last point doesn't even matter because pretty much no game offers any major consequences to actions except perhaps Japanese visual novels and adventure games. Even something like Mass Effect was pretty much a joke for major consequences. In ME, we saw ONE major choice in the entire first game deciding one crew member living or dying... one major consequence out of an entire game that was marketed as being all about choice and consequence.... that's where we're at, pretty much, except for the completely different outcomes in multi-path, multi-ending Japanese visual novels and adventures where major consequences for choices are fundamental. It's pretty crazy for complainers to whine about choice and consequence in a BGS game where you have a great deal of freedom while the majority of the industry, especially in the Western markets, doesn't even offer any freedom at all, let alone any kind of choice and consequence. There's nothing to offer as a counter-example in Western development, so why complain about the lack something that no Western developer does, especially when we have not (and could not have) seen that mechanic for Fallout 4 so we cannot know about it (or the lack of it) until the game is out and we play it?