Just a small remark: the 3.0 Ranger did have a pet, starting at 4th level. If wasn't written then explicitly in the class progression chart, but it could be obtained by casting the Animal Friendship spell.
The rogue had major issues in 3e when they couldn't sneak attack the undead. That was a problem of play. I won't say they're "holding the party back" but they're certainly better off less involved in combat than they'd otherwise be. A 3e paladin involved in a game where there were actually very few outright evil enemies (say, battles against slaadi or agressive neutral characters) was cutting off a good chunk of the paladin's abilities.This concept is so foreign to me. Was the thief holding the party back because there weren't locks to pick?
I think you are not going to worry too much in 5e then, since the Ranger is not really a "slayer" of his favored enemies. All she gets is FE's language proficiency, advantage to tracking and to knowledge checks. A generous DM can at best let you use the latter to get some clue on combat strengths and weaknesses, but overall these benefits are not that relevant to the combat phase.
Many of you seem to be missing the point. The 5e Ranger has a "favored enemy" option as a ribbon feature, but the real successor to this is the Hunter's hoard breaker vs Colossus slayer ability. It hearkens back to the more broadly applicable 1e bonus, rather than a game of guess-what-the-DM-will-throw-against-you-when-even-he-does-not-know of 3.X.
Kinda.Many of you seem to be missing the point. The 5e Ranger has a "favored enemy" option as a ribbon feature, but the real successor to this is the Hunter's hoard breaker vs Colossus slayer ability. It hearkens back to the more broadly applicable 1e bonus, rather than a game of guess-what-the-DM-will-throw-against-you-when-even-he-does-not-know of 3.X.