They stole my my help as a bonus action idea...
I do agree that there should be more reasons for rogues to boost more than Dex, though.
I think it's interesting, and should be pointed out, that this one ability is the entire 3rd-level combat feature for a subclass. Because it is quite potent. Anyone toying around with home-brew classes that are built around helping/bolstering allies should keep that in mind when weighing what all else they are giving them...
I'm curious... why do people feel this way? I'd rather have abilities that aren't dependent on multiple attributes or that replace physical attributes with mental with little to no explanation... but I am curious why other's feel this would be a positive?
I've not seen anyone in the thread advocating arbitrary substitution of mental abilities for physical ones as an attack stat; I think that is a red herring.
For me, though, the answer is heterogeneity. I want there to be multiple interesting builds for the rogue, and there are just so many stories about rogue-like characters that are not about their agility and reflexes. There are stories I want to play, but the system currently punishes that diversity, I feel.
(And it's not just the rogue: Fighters already have a wider variety because they have two equally viable attack stats; wizards have eight schools; and (in 5e) you can make legitimate STR, DEX, WIS, and CHA-based clerics -- Int too via knowledge domain, though I'm not sure you'd want Int ahead of Wis in any case.
The potential for the same flexibility is in the rogue, and we've now got 4 subclasses for the rogue; but even a viable strength build is hard to pull off without at least a 14 or 16 dex. Instead, what the game has given us is a large number of backgrounds that allow you to mimic a rogue without being one -- currently, that's the best way to develop the variety I would hope for.
(Just speaking for myself; ymmv; my opinions are my own and do not necessarily represent those of my employer; etc.)
I'm a little confused here so I'll ask again... exactly what Rogue archetype are you trying to recreate where Dex should be lower than a 14? And at that point are you probably looking for a different class in the same way you had to take ranger as opposed to fighter in 4e to be a decent archer?
Probably because people want to be a "mastermind", not a "rogue mastermind." Only guessing.
I know for me, I would like a martial class that put mental stats ahead of physical stats. Since that doesn't exist, rogue is closest to filling the niche.
By making them MAD; MAD is an issue for some, other would gladly accept it to reach a particular character concept (see monks).But how does said hypothetical class stay competitive in combat without having some kind of physical capability?
By making them MAD; MAD is an issue for some, other would gladly accept it to reach a particular character concept (see monks).
But if they are giving you abilities (like in the Mastermind) that aren't (for the most part) dependent upon secondary or tertiary abilities but still allow you to influence the game like said archetype would... what does it matter?
Edit: It seems like asking for a drawback in order to gain something they are/will give you without it. And this still doesn't mean you can't raise your Int/Wis/Cha to fit your vision of the archetype.