While I was shocked that we got power armor, a minigun and fought a deathclaw so early, I can see how it all worked out. The power armor hangs in my shed while I go out and fight. It's a cool thing to have but its not new. It is something that will be really cool when I get it upgraded. The deathclaw is something longtime fans have seen over and over, so while the fight was really underwhelming, the game has much newer and more interesting threats to throw at us later on, including new versions of our old favorite monster.
What's more, one of my biggest complaints about things like miniguns, the fat man and power armor in the previous games was this: by the time you get them, you don't need them. Yes, getting power armor in 3 and FNV was cool, but by the time I had it I could kill anything and everything without much of a sneeze anyway. By giving us these items early in the game, we can rely on them to help us through really tough spots, making them seem super valuable. Which would be bad if they were just a crutch, but they now have inherent limitations that keep them from being an auto-win and are upgradeable to keep them useful throughout the game. This is waaaay better than finding them later on and going, "Neat, guess I'll go toss this in the bin with teh other really cool but totally unnecessary crap I have."