How is Hex heavily used in the social pillar? To catch someone lying? I literally never saw this either.
The most common is Influence actions, most often Deception Checks, and sometimes other Charisma checks, usually targeting the opponent's Wisdom.
I have seen the disadvantage on ability check come into play once or twice in combat, but its not thaat often. Especially now that grapple is a saving throw.
The most common in combat is Wisdom, Dexterity and Strength. The initial Grapple is a save, but escaping it once grappled is still an Actobatics or Athletics check. There are also spells that require an Athletics or Acrobatics check to escape.
Then Wisdom to lower passive perception and make the Rogue's cunning action hide easier (or automatic) and also to enable either Slight of Hand with Fast Hands or Mage Hand Legerdemain both of which Thieves and Arcane Tricksters use a lot.
I would agree it is not every fight, but it is often enough and is going to be used on occasion in the average 1-20 campaign where the advantage on Hunter's Mark typically won't be.
The getting hex on a hunter in 2014 for me looks completely not understandable. You only need to use 1 spell known from your class to get hunter's mark, but you need some feat or similar to get hex. Thats much more investment.
Fey Touched is one of the best Feats in the game, arguably the best feat period for boosting Wisdom. It comes with a free 1st level spell and why waste a 2014 Ranger slot on Hunter's Mark when I can get a better spell with Fey Touched.
The other way I got it on 2014 Rangers was with a Warlock multiclass, usually on a character with a lower Charisma than Wisdom.
Also whenever you want to follow somone, which is not thaat uncommon, hunters mark can be useful. You can even cast it on a party member, if you think you get separated from them and can find them easier. This fits a hunter spell perfectly.
Like I said theoretically yes, but I think I have seen this used twice in all the time I have played 5E. I've seen the disadvantage from Hex used more often than that in a single fight, multiple times.
Also its only vocal components so easier to cast over vocal + somatic + material (especially if you are using a 2 handed weapon or are dualwielding).
2 handed weapon is no problem in 2014 or 2024 rules, you can hold a two handed weapon with 1 hand and only need 2 hands "when you attack with it". So you cast the spell and then attack with the weapon.
As far as Two Weapon Fighting or Light Weapon fighting, in 2024 there is no difference here since you can stow and draw a weapon when you make an attack and you don't even have to be holding the other light weapon ahead of time to make the attack with it. In 2014 the rules were different, but back then we did not have Nick so it really wasn't in play there either. In 2014 if you were casting Hex or Hunter's Mark you were not making your bonus action Two Weapon Fighting attack anyway.