Trolls said:
Next iteration:
-New standard action symbol (looks great!)
-Redrew exclamation mark (wasn't quite symmetrical after the resize, edges looked strange)
-Added blur behind action symbols to make them blend in/feel more natural
-Added Attack type (Int vs. Ref) to last notch. That leaves us with nowhere to put Channel Divinity or Pact etc. The trick is whether that or Sustain: Minor is more important. For warlocks, it's not (pact is a one time choice), but for Channel Divinity, it does determine how often you can use the power. Any thoughts?
Trolls:
First of all, I registered here just so I could provide said thoughts.
- I agree that action symbols fit better in the top left than attack type. It's arguably the symbol that will matter the most for "what can I do" when digging through the pile, as it were.
On to the more critical side of the constructive feedback.

Namely, my suggestions for this latest batch you posted. (Don't get me wrong, they're gorgeous, but I feel things can be a little more streamlined; PLEASE DO NOT EAT ME for being presumptuous.

) I wish I had Photoshop skills so I could demonstrate what I mean... oh wells.
- Sticking the "action" type in the bubble as well, perhaps under the symbol or over it, would also get the point across. You could then remove that particular line from the actual card box itself and save a little space, as well as free up an entire notch. The same with "ranged 10" and similar attributes. That notch gets the main point across, and a little text (albeit tiny text) will reinforce the meaning.
- I would remove the "power type" from the notches and stick it as the first line in the main text box with its own font to make it stand out (maybe a little big larger as well). I keep envisioning it being displayed in a more calligraphic font. Potentially seeing "Wizard Attack 1" for, say, Ray of Frost on the side is kind of "whatever", even though it would help sorting the cards. In all seriousness, I'd care more about the WHEN than the IF; ie - I'd be looking to see what powers I can use at X time in the adventure, not what's coming up and so on and so forth. Maybe that particular detail could go in the top right corner as three lines?
So to rehash, this is what I'm suggesting in a more textual format, using the Bigby's you posted. Parentheses around text means it's tiny text.
Code:
SYM Bigby's Crushing Hand Wizard
BOL Attack
(Standard) 15
Int
vs. Ref
(Attack) LOTS
OF
2d10 POWER TEXT
+ Int
(Hit)
10
(Ranged)
This jury's still out on the idea of other things, such as sustain being in a notch, and so on. Some of the details seem best suited for the text, so I dunno.

This is just me being a feedback minded person is all!
/goes to bed now