I think that the Cleric, especially with the Life domain, is a great design. It's a great mixture of short-rest and long-rest mechanics, so you can always do something magical, even if it's not just spellcasting.
The Rogue is also pretty solid, and while it lacks the ability of the Fighter or Paladin to suddenly double its own efficiency, I would consider that to be a flaw in those other classes rather than anything the Rogue is missing.
The worst design, hands down, is definitely the Paladin with its smiting and double-smiting and on-crit-smiting. Everything it has is pulling from its spell slots, and it gives you the ability to run through your spell slots faster than anyone else in the game, which absolutely wrecks pacing. (Note how nobody else is allowed to cast two slot-based spells on their turn, since bonus action spells can only be paired with cantrips.)
I'm also not a huge fan of the Warlock, because of the unique and easily-abused short-rest spell slots. Between the patron and the pact, it's also a little bit too complex, considering you still have all of the normal differences from spell selection. It seems like they could have really streamlined it in order to bring it more in line with the Sorcerer.