Well...what should I say...I completely disagree with most of your points, as some of them are just not a step back but a step forward to me, like the voiceacting (hell, I was thrilled yesterday in the main quest as i found K****!)
Further "critisism" like "to less armor, vaults, caves, metro" is just wrong, sorry buddy. I bought the Vault Dweller Survival guide, it nearly has 600 pages full of monsters, statistics, quests, items and locations. I'm blasted how much content there actually is!
You have 5 or 6 vaults in total in FO 4, enough if you ask me!
There is far more than your mentioned 4 types of armor, you allready got 4 different types of Power Armor, leather, metal, raider, synth, combat armor with several "quality levels (leather armor covers more of your body and has higher base resists and so on) depending on the level of the area you are. Everything modable to adapt to different playstyles.
There is just a ton of variations in the armor, no Fallout game ever had.
The perk system is great and makes sense. The old SPECIAL-skill system was nonsense, cause you could have 100% Melee Damage but one hit everything with just 1 point of strength. Erm, where's the logic?
Could go on for a while, but most critics come from people, who claim to be "Fallout Fans" till Fallout 1, and that's the prob: Nostalgia!
Games change, they develop. Some people don't like it, some do. But calling everyone who likes FO4 a "12-17 year old CoD-Fan" is insulting for me, as I'm a 28 year old RPG-Fan who is disgusted by CoD and other FPS-[censored]...Maybe your expectations where just far to high/retro?