I havent played the beta test yet, but you are not the first one to say that the game's ranger are spot on. How do they deal with the ranger's features and would they be portable to the table top game?
I haven't delved deep in it as my computer/laptops usually suck when it comes to pc games and I haven't
yet taken the plunge to explore how good my current HP I5 Processor is for running said games. But I've read a few things about the Baldur's Gate 3 5E Ranger and thought the idea of it's take on Favored Enemy was pretty interesting.
Their take on Favored Enemy has a terrible name but the idea is very cool: It lists a number of five options you can pick from and said selection acts like a 5E "Background" that gives your Ranger different bonuses and options.
You choose from the following:
Bounty Hunter-Allows your Ranger to gain Thieves' Cant, proficiency in Investigation, and have Advantage on Restraining.
Ranger Knight-Gives your Ranger History and Heavy Armor proficiency. So now you can try to make your Ranger "tanky" in that regard while showing off how much of a smarty pants they are with nobility.
Sanctified Stalker-You gain proficiency in Religion and gain the Sacred Fire cantrip. WIS is the spellcasting for it.
Mage Breaker-You gain proficiency in Arcane and gain the True Strike cantrip. WIS is the spellcasting for it.
Keeper of The Veil-You gain proficiency in Arcane and get Protection from Good and Evil.
Flavor wise, I get the "intention" of naming this all as "Favored Enemy" as it implies what your Ranger specializes in fighting: A Mage Breaker deals with magic users and is capable of understanding how their magic works via their knowledge in Arcane in order to counter act said spells, a Bounty Hunter knows the lingo of criminals and crap while being able to track them down and bring em back alive, a Sanctified Stalker fights against undead/devil/demons or defends the holy grounds of a deity. A Keeper of The Veil helps their druid allies fight against Aberrations. The Ranger Knight fights alongside the Crown Oath Paladin in the name of the king, etc, etc. It gives stuff that would "make sense" and avoids the more crappier PHB take on Favored Foe. But outside of the naming implications, Favored Foe is better off being just labeled as a Focus/Discipline really.
And then Natural Explorer is very basic. Again you choose from five options: Wasteland Wanderers get fire/ice/poison resistance(the three being classified as different selections) while Beast Tamer allows them to cast Find Familiar as a ritual. And then Urban Explorer gives you the use of Thieves Tools and Disguise Kits.
As a DM, I honestly wouldn't
mind at all allowing the use of BG3's Favored Enemy as an extra side option, after choosing your Ranger background, that Rangers can pick as their Focus/Discipline. It would be exclusive to Rangers only. So I say that it would be portable in that regards. (As for the BG3 Natural Explorer, YMMV.)