On the issue of mechanical overlap:
I don't know a great deal about Battle Master manoeuvres. But here are some I found on a wiki:
Ambush: When you make a Dexterity (Stealth) check or an initiative roll, you can expend one superiority die and add the die to the roll, provided you aren't incapacitated.
Commanding Presence: When you make a Charisma (Intimidation), a Charisma (Performance), or a Charisma (Persuasion) check, you can expend one superiority die and add the superiority die to the ability check.
Menacing Attack: When you hit a creature with a weapon attack, you can expend one superiority die to attempt to frighten the target. You add the superiority die to the attack's damage roll, and the target must make a Wisdom saving throw. On a failed save, it is frightened of you until the end of your next turn.
Tactical Assessment: When you make an Intelligence (Investigation), an Intelligence (History), or a Wisdom (Insight) check, you can expend one superiority die and add the superiority die to the ability check.
The same wiki also tells me that Battle Masters get this ability at 7th level:
Know Your Enemy: Starting at 7th level, if you spend at least 1 minute observing or interacting with another creature outside combat, you can learn certain information about its capabilities compared to your own. The DM tells you if the creature is your equal, superior, or inferior in regard to two of the following characteristics of your choice:
[INDENT
- Strength score
- Dexterity score
- Constitution score
- Armor Class
- Current hit points
- Total class levels, if any
- Fighter class levels, if any
[/INDENT]
To me, this all looks like a red-hot mess. I'm not sure I've spotted all the weirdnesses yet, but here are some:
* In the fiction, what is the difference between Menacing Attack and using Commanding Presence to bolster an Intimidation check?
* In the fiction, what is the difference between (i) a Battle Master who N times between short rests can make certain CHA-based skill checks with a random bonus between 1 and 8, 10, or 12, and (ii) a Bard who has a constant bonus to certain CHA-based skill checks (from Expertise) that is a flat +2 to +6? Or to put it another way, why does the system use such different mechanical devices to model the same thing - ie being a charming or commanding presence?
* In the fiction, what is the difference between a 7th level Battle Master spending a minute to size up an enemy, and any one else at any time doing so just by looking at them? Presumably the information provided by the Know Your Enemy ability is information that is knowable just buy looking, so why can't others look? Why does the 7th level Battle Master not just get a bonus to, or minimum roll for, the appropriate WIS (Perception) or WIS (Insight) or whatever check is appropriate?
* In the fiction, what is the difference between a Battle Master making a Tactical Assessment and a Battle Master Knowing His/Her Enemy? Even if we ignore the previous dot point, why such different mechanics for what is, in the fiction, presumably the same intellectual capability?
* Isn't is just stupid that a 3rd level Battle Master can, on a good roll of the superiority die for Tactical Assessment, do better at an Intelligence (History) check than a scholarly Bard of the same level? Likewise for Stealth via Ambush, compared to a sneaky Rogue.
It seems to me that this is not a case of different classes with different mechanics for different concepts; but rather a fetishisation of a particular mechanic (superiority dice) producing inconsistent and I would say incoherent mechanical realisations of the same concept.