I look at Scene Distinctions as giving the players/watcher Distinction options which could very well be relevent to any action taken in that scene.
Personal Distinctions might not always be useful positively or negatively.
Scene Distinctions also add variety.
I've only got three Distinctions on my datafile. After a while, I'm going to get tired of making my narrations fit the same box to incorporate those three Distinctions (negatively/positively). But Scene Distinctions give me new options with every scene I swing/fly/jump/run into. So instead of using "With Great Power Comes Great Responsibility" negatively for the umpteenth time, maybe I'll use the Scene Distinction "Smokey" to grab that D4 and get +1 PP for a little diversity.
Anyway, that's how I'm looking at SD's.
Now maybe someone wants to come up with a house rule for Scene Complications or Scene Assets that are just present and everyone has to deal with until they are overcome/used up? You'd also be able to stat it at any die that the watcher deemed appropriate (D4-D12).
This sounds like what some people are after to me.
Scene Complication: Darkness D10
Everyone that makes an attack/action will have this D10 used against them in reaction rolls until it is somehow overcome. I.e. fix the backup generator or some such.
While I could see that this might be desirable to some, I still think it will cause more headaches than it is worth.
With the example above, SC: Darkness D10, what if my character has Enhanced Senses and I say that includes nightvision. Do I just beat the Scene Complication?
Anyway, it's an option for those that want it.
Myself...I don't see a need to fiddle with Scene Distinctions, but if others find a way to make the game better for them, more power to ya!