I'm reading the complaints, and I agree with some of them, but with everything FO4 does right, I can't believe the wailing and screaming I'm hearing on some of these issues. So here are some positives.
1- I love the way they handled power armor this time around. I feel like I can use it as much as I need to, but I can't waste suit time. I've got a reason to try out the other gear, and not tramp around the whole game in the armor. When I'm using the armor, I feel that I've got a significant edge, but I'm not invincible, which is perfect. So I use it in big set pieces, but it's overkill for a random wandering encounter. And having multiple suits that I can hot rod and display is icing on the cake.
2- Traps are hard to spot, and deadly. Once I (quickly) got used to FO3's traps, they were a joke. Mines were a $$ opportunity. Now, they're not funny. Not funny at all. I like it.
3- Dogmeat is the most convincing yet. I get a kick out of all of the "real" dog mannerisms, and I wonder how much time Bethesda put into it. In fact, that random little whine he gives as he's walking along is a bit too realistic. It hate it when real dogs do that, and unlike a real dog, I can't tell Dogmeat to put a sock in it. But he's a good guy, a useful companion, and unlike the rest of them, he doesn't judge or have an agenda.