Larian's Ranger homebrew is unbalanced on top of this and offers really bad "trap" choices like True Strike which is universally considered a horrible cantrip and more so for Hunter's Mark reliant Rangers. Where's Larian homebrew when it is called for? Sacred Flame is another trap choice - pitiful on a martial class. Protection from E/G is decent, but not when competing with Hunter's Mark. At the very least offer a free casting. The proficiencies are barely passable for Rangers as they are not thematic/obscure and Intelligence-based which is considered a dump-stat for Rangers. The Ranger Knight is clearly a stronger choice than most/all others given how much Larian has buffed Strength gameplay through their Shove and Jump mechanics, and having this appear to be the best choice is doubly problematic as it is a mismatch with what Rangers are supposed to be thematically. It's like making the "Armored Hulk" the best Rogue "subclass". Besides there are better subclasses (eg Oath of Ancients) that cover this kind of style anyway - so it doesn't really offer anything new. At least change recommended ability to Strength if you pick this so players new to D&D doesn't waste their points on Dex (another potential trap).
I actually don't mind the extra proficiency because it covers what's usually a dump stat. It's a nice little flavor feature that doesn't really break balance in any way as the bonus is pretty minor and it's skill proficiencies for non-combat stuff anyway.
I would disagree about the ranger knight being a trap choice they are actually quite good with high dex because of rapiers. Rangers also get a good number of non-concentration utility spells like longstider that rock on melee martial classes. Ranger Knight I personally like because it is incredibly versatile with good AC and survivability due to heavy armor, high ranged and melee damage (assuming you use a finesse weapon) potential because of high dexterity and hunters mark, and utility casting of things like fog cloud or pass without trace when you need it. I like this FE the most because it heightens the fantastic versatility rangers generally possesses.
The bounty hunter kit is the other one I really like for the opposite reason because it heightens a more specialized approach around ensnaring/entrapping.
Because ranger knight is such a versatility kit my hope is that the other FEs act more like the bounty hunter and specialize the kit a bit more like thieves can't does.
