Branduil
Hero
IMO, by far the best thing 4th edition did was separate the monster rules from the PC rules. Designing interesting encounters was far easier than in any prior edition, and running the monsters themselves was a relative breeze, because everything you needed was right in the stat block.
Unfortunately, it seems like 5th edition is taking a step backwards to the bad old days of 3.x, where not only did you need to stat up every custom enemy with the complicated PC rules, but you also needed to either memorize or look up a list of spells if that monster was a spellcaster. I hope I'm wrong, but it seems like 4th edition's ease-of-use for DMs has been sacrificed for the sake of the larger player-base.
Unfortunately, it seems like 5th edition is taking a step backwards to the bad old days of 3.x, where not only did you need to stat up every custom enemy with the complicated PC rules, but you also needed to either memorize or look up a list of spells if that monster was a spellcaster. I hope I'm wrong, but it seems like 4th edition's ease-of-use for DMs has been sacrificed for the sake of the larger player-base.