Skyrim spoiled me and it made it hard for me to go back to F3/NV. The sad thing is that even Skyrim has flaws that hopefully F4 will fix, so what does that say about F3/NV? Aside from the aesthetics, which Skyrim completely made tolerable (which I actually think the graphics/characters are pleasing to the eye), is the better animation, camera system, dialog not being pausing the game and zooming in, etc.
F4 even takes it further. I like not being tied into some locked mode. The locked dialog mode has always been buggy, whether someone is behind a wall talking to you or interrupts your gameplay by automatically changing your focus towards them during scripted moments; even with Skyrim. I'm hoping the new context-input mode doesn't bug out the same way, though, like not showing options when they should be there, as well as performing a certain action you didn't want if someone happened to run in front of you. Gameplay looks so fluid and fun in Fallout 4. So everything feels great and looks non-obtrusive. That's great.
However, each installment has stripped away character building and interaction with other characters, to some degree. Skill are still there and Perks belong to Fallout games, but looking at Skyrim -- that was a game that made skills felt like it was something you bought rather than earned. Race bonuses and attributes didn't feel too unique, nor stood out. Any race, any character, at all times could level up the same way in all skills. It's just broken down into Health, Magic, Stamina, which is more than standard. Less guilds, worse quests in those guilds, no need to repair weapons or armor, worse alchemy and potion/poison creating, lack of rarity found in the world, etc.
The thing is, Fallout is actually quite deserving of MORE RPG elements than it already has, yet it's not getting that love. It can't afford to lose what it's already got.
Gameplay being streamlined =/= reason to shaft RPG elements.