I gonna say nope to #1.
I gonna say nope to number 2. What if my build is the smart guy who solves problem with their wits? Or the brute who relies on Strength? Or the pacifist? Nope, I can't deal with any NPC in the entire game except based upon my Charisma stat. I can't out think them. I can't intimidate them(using something other than Charisma, which is dumb, a Str 10 person in PA holding a gatling laser with Charisma 1 can't intimidate. makes 0 sense). So, my starter points really don't mean anything, and there are even level caps on certain builds, meaning even if I tried to do some things, I am held back, which isn't the same in the other games where Special decided your play style, there were skills to enhance this, perks gave added advantages, now Special is nothing more than perk requirements, there are no skills, and perks decide your play style.
3 isn't anything particular with RPG games. Can do this in a lot of different games.
4. ditto.
5 is same response as 2.
6 Depends on your build if you can play it how you want. If you are specialized in killing folks, sure, you can make a killing machine. But again, if you want to approach in a different manner, no, you can't. Just like you also can't play any form of evil outside of psychopathic murderer.