What would you mechanically extract from the 4e ranger then?
So, looking at Ranger powers, starting with attack powers, some of this could be abilities, some would better fit a new fighting style or other more passive ability.
Warning Shot (at-will): You shoot a target, and mark a spot either in or adjacent to their space, and if a creature moves into that space you can shoot them as an immediate action. I'd probably translate this as an ability to mark a target, and if a creature moves out of that space or out of a 5ft radius around it, you can make an opportunity attack against them.
Ferocious Insight: (encounter)Your beast companion attacks, and you and thecompanion can move with the target if they move.
fox's Cunning (encounter): triggers on an enemy attacking you. you shift and then attack the target with a bonus to the attaack.
Lots of powers give movement as part of the action, slow the target, etfc.
Hurling Charge lets you throw a weapon and then charge, which could be translated as a bonus to damage and speed when you make a ranged and a melee attack with one action.
Then utility powers features stuff like Archer's Stairway, which helps your allies climb, and Terrain Advantage, which gives fyou a defense buff while in difficult terrain.
I agree on favored foe except when you consider it uses no spell slots and takes no action to initiate. If you are not already concentrating the opportunity cost for using it is very low. Even if you plan on casting a concentration spell on the very next turn, it is a flat and largely free damage boost on that turn.
On the other hand, with all the extra spells the Ranger can have now, is Hunter’s Mark
actually a big cost, now?
Because at least at d4, Favored Foe has to be allowed to stack on top of itself round by round to even come close to Hunter’s Mark. Without that interpretation, I don’t know if it ever catches up. The difference is big enough that if you’re after damage, you get more damage and more utility by learning HM and keeping Favored Enemy, IMO.
I’d only ever choose FF if I didn’t know my DM, to reduce the DM dependence of the class.