Like the old saying goes. You can't please all of the people all of the time. At the end of the day, for every 2 people screaming 'streamlining' or 'dumbed down', there will be 10 others who are enjoying those games, at least 5 of them for the first time. Perhaps some of these gamers will go on to appreciate the predecessors in the series and agree that past games offered more immersion and depth.
Despite some well articulated in-depth points about false customization ruining replay value, we must remember Bethesda is a business above any thing else. They may listen to critiques to a certain extent as evident to Dragonborn DLC being aimed at nostalgic Morrowind players, but in this day and age, they will never over-complicate character statistics to a point where you need a degree in calculus to mathematically plan your character.
It's amazing the way some of you have taken the time to crunch numbers and break down stats pros, cons and flaws and calculate what works and what doesn't work. Unfortunately, thinkers are in a minority. If I wasn't a Fallout / TES player, new to these boards, the way some of you converse in depth about stats and numbers would read like a foreign language to me, lol. Most gamers nowadays will never even bother to dive that deep into crunching numbers with stats unless they read a wiki page or see a mod that is proven to grant them a better experience. Bethesda knows this and so do most other devs. The fact that graphics seems to take priority over gameplay nowadays speaks volumes about where the gaming industry is headed.
I wouldn't be surprised for example, if Bethesda did choose one kind of defense stat for Fallout 4 to replace both DT and DR stats, where a new fan might have wondered 'what the hell is the difference?' When I first played New Vegas, it even took me a minute to understand the difference between Damage vs Damage Per Second.
If Bethesda streamlined this stat into one damage stat, it doesn't necessarily mean Fallout 4 has been 'streamlined' or 'dumbed down' for casual gamers. It could mean that Bethesda could want players to spend more time actually playing the game on their own and less time googling and watching youtube pro tips on how to play the game.