So... you're saying it was adapted to the 5e paradigm? And are trying to make that out like it's a bad thing?
Also I don't see the 'everything' sacrificed?
It feels 5e, it plays like a Warlord, it performs well enough.
Yeah I'm done with you.
I was at work on my fone hence a short answer.
The longer answer is Moonsong designed a base class and then a subclass stripped out those features in order to make the noble, and the noble cold not do much of anything else because it was all tied up in attack granting. The more elegant way would have been to give the class no armor proficiency, simple weapons or a list of a few weapons and then adding in things like medium armor, heavy armor, and marital weapons.
We did actualy test the Noble, at least the Heart one or whatever it was called and yeah we broke it (in the right party). In the wrong party its very very meh which once again no class really pulls off from the PHB (the worst being the elemental monk and beastmaster perhaps).
So yeah the mechanics don;t really fit in and the class can't really stand on its own to feet in an average party and if you build the party around it its broken. You kind of need a 5 or 6 person party to do it with some extra support for example (a cleric, Paladin, bard etc).
Its why I believe the concept in inherently flawed, you either have a broken/weak PC or you throw in the attack granting hting but then you would have to be very very careful not to break the game. The only class I can see it working on is some kind of Rogue as they would be giving up thier sbeak attack to enable someone elses.
Losing a reaction is not that big of a thing in 5E anyway especially if you do not use feats.