I'd say the two classes I came out from reading the PHB feeling pretty "Meh" about are the ranger and the sorcerer. I'm sure ranger does OK, I just don't see a lot about them to get excited about. I'm thinking that a lot of their uniqueness might be in the spell lists, rather than the class features.
I haven't run the numbers yet, but taking Dueling instead for the damage bonus on attacking with a single weapon, plus the bonus action help, might yield a comparable DPR.Hmmm even the bonus action help isnt that good, since it only gives adv on a single attack. If youre twf you could just use yr bonus action to attack... the main pet adv is extra target/bag of hp, isnt it? I dont have the phb, but presumably there are spells to buff the pet, or use it to scout, etc..? And rangers are typically very stealthy, so they have that over fighters. Im guessing their spells are a significant part of their effectiveness in combat and out.
So the features of the class may be leaning towards more of the exploration pillar.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.