Most of the folks on here do not have the fortitude to handle Direct.

At least with initial communications. Providers want pertinent information in the first, or no later than the second inquiry and I think that is not just fair, but professional as well. Being "blunt", as you put it, is a good thing initially, as long as that bluntness isn't coupled with rudeness or boundary pushing.
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After a first meeting, nuance and subtlety can come into play as long as it does not come across as time wasting. It's a fine line for some, but I tend to be direct up front, then as the relationship develops and progresses over time in additional meet ups, as the lady gets to know your heart and intentions, they often will allow some wider latitude in how/when/how often you communicate with them on a case by case basis, as this is certainly something that would fall into the YMMV category.  
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My rule of thumb is just don't have any expectations and just let things flow organically. RW friendships, while rare, can happen in this lifestyle if they aren't rushed, pressured or pre-planned. Amazing things can happen between two good people when adequate trust is built over several/many sessions.

Are you speaking from the POV of the providers, i.e., do they like customers to be direct, or from the view of the customer, and whether they like the providers to be direct?  In P4P, directness is the only way to go.  It will prevent misunderstandings and allow both parties to know where they stand without any gameplaying.  When I'm direct, I achieve a level of mutual comfort with a provider by the end of the first session, while those that are subtle and want to think they are seducing a woman who is a sure thing may not achieve the same level of comfort until the second or third meeting.  Providers who are easily offended by directness usually don't have a sense of humor, either.  It's a biz for both parties, but that doesn't mean you can't connect through the physical contact you will be engaging in.  Get the endorphins flowing from sexual activity and you will both be into it despite the fact that you just met.

IRL, when younger, I was very direct.  In doing so, I often got the vibe that people thought I was an ass, and perhaps I was.  As I matured in my career, I remained direct, but more tactful.

In this hobby, I'm too new to just come in and stream roll.  I let the provider drive the boat and maybe politely ask for someone once we're into it, but I never come and and say "this is what I want".

isn’t directness or subtlety — it’s precision with intention.

 
Directness without warmth can feel like a blunt instrument. Subtlety without clarity can feel like a guessing game. But when someone knows why they’re choosing one approach over the other, the whole dynamic changes.

 
If I’m trying to avoid confusion or set a boundary, directness is a gift.

 
If I’m trying to read the room, build connection, or leave space for someone else’s comfort, subtlety has its place.

 
To me, the attractive part isn’t the style — it’s the self‑awareness behind it.

 
Someone who can shift gears, who knows when to be clear and when to be soft, usually communicates with more confidence and more care than someone who defaults to one mode all the time.

 
So I guess my answer is: Directness is powerful. Subtlety is elegant. The real skill is knowing when each one serves the moment best.

As others have noted, there's a lot of opportunity for directness to turn into rudeness and for subtlety to become obtuseness.  

Aside from all the other attributes that a woman needs to possess, I look for confidence.  From the way she walks to the way she talks. I've met women who felt obligated to dispute just about everything I said in order to prove their strength, and others who might change their names if you looked at them disapprovingly  

But a woman who walks in like she has command of herself, who meets my eyes with steadiness and engagement,  who speaks with firmness in what she knows and openness about what she doesn't, and who moves her body like she knows what it can do, that woman is gonna get me coming back. In short, confidence is a boner grower.