why can't you max out all your skills in this like in fallout 3 , it would make the game a bit better because you don't have to watch where you put all your skill points . ...
Also a dlc with alot of extras for each faction would be awesome

You can get pretty close if you plan ahead (and the DLC will make it easier) but you cannot max everything. With the exception of some Perks that require 90 Skills, though, there's not really any need except to see those 100s and 10s up there. With the added magazines and the Comprehension Perk, 80 is the new 100.
Have you played a character up to Level 30 yet? The experience I had was that a level 30 character in New Vegas, played wisely, is almost unbeatable. While you might miss the fun of seeing perfect SPECIALS and Skills, you'll find you don't really need them.
Oh, and as you have probably guessed from all the kind responses you got, a lot of players enjoy creating specialized characters rather than going for the jack of all trades. The game supports this approach. F3 supported the latter.
I like your DLC idea, except the NCR already has enough content. The others could use some added time. I'd like to do more with the Khans, myself.