As a player who has played RPGs since they began with the original D&D, AD&D, and Wizardry, as well as franchises like Phantasy Star and Ys, I have to correct one thing in your response.
Bethesda did not and has not changed anything about the original RPG mechanics/concept. Fallout 1 and 2 were not very good RPGs, plain and simple, which is why they did not do well and were only niche market products compared to other RPGs. FONV had the same problem, more or less. Elements such as dialogue choices leading to different paths and consequences or having multiple ways to complete a quest are NOT fundamental RPG elements at all and never have been. Multiple paths are a standard, fundamental element of Japanese adventures and visual novels, a genre of games that has never had mainstream market share in the Western markets despite many of us loving them greatly (and even sometimes pointing out that they could possibly be argued to be the only "genuine" RPGs exactly due to the mechanic of multiple paths and consequences to the choices made during a playthru).
The point here is that elements such as multiple paths and dialogue choices leading to different consequences, or different ways to complete quests, were never part of any RPG in the past but were fundamental to Japanese adventures and visual novels, as well as hybrid RPGs that incorporated those elements such as Langrisser, Growlanser, and Agarest War, just to name a few franchises as examples. If these elements HAD been fundamental and/or had they had decent market appeal in Western markets, it is likely BGS would have focused effort to include them in some significant way just as they did with other elements that have proven popular (e.g., building/sim elements... I'm not a Minecraft fan or Sims fan, by the way... and ironically, these elements are exactly the elements that people screamed for after FO3 was released, elements that allowed players to have a world where rebuilding was more evident).
Fallout 4 is a great game, better than pretty much any other game on the market today (new games, not prior products). It blows prior BGS games like Skyrim out of the water because Skyrim had so great a bias towards melee warriors and lack of any sort of reward for doing anything versus ranged combat or magic. BGS Fallout has had (and still has) a similar problem to the latter point with energy weapons (i.e., an enormous bias towards ballistic weapons and against energy weapons). Fallout 4 has some issues (e.g., far too restrictive on materials/resources such as wood and steel for basic building, the usual horrible character visual aesthetics, etc) but is leaps and bounds beyond products like Witcher 3 due to the simple fact that it allows a far broader appeal and play style (as can be seen by many people stating that they have no interest in Witcher due to being forced to play Geralt, a character of no interest to most players). For writing/story/characters, nothing is going to beat the Japanese-made RPGs (not Japanese RPGs as there is no such thing... the Japanese got the idea for RPGs from Western developers, specifically Wizardry, and did not come up with the concept on their own).
People who complain cannot name another game with more value and/or more interactivity/content. Yes, everyone has preferences, but people who prefer other types of games such as FPS or puzzle games should not be buying and attempting to play an action/RPG hybrid. It's like using a screwdriver to try to hammer in a nail and complaining that the screwdriver is poorly designed for the task. Well, of course it is because it isn't designed to hammer nails.