That is my absolute favorite fantasy series of all time. Though Sanderson's Stormlight series, once finished, might give WoT a run for its money (assuming Sanderson and I both live long enough to see it done! Gods dammit Sanderson, write faster!!).
You've got good points, of course, and there's no excuse for a bad novel (haven't read Island of No Return yet, though I got it for my daughter recently) and comics can express certain things far better than prose (and I'm not discounting the differences in page length, that matters too). I'm just talking about the way prose can dig into a character's head, which comics can't do quite as well. Between the typical action-oriented structure of comics and Diana's character being more complex than most other comic characters, I'm just saying she'd fit nicely into the prose format.
And don't read Dixon's WoT comics, you shall be disappointed. It was indeed an impossible task, much like trying to turn that behemoth of a story into a tv show. I wish that show all the luck in the world, I hope it's as big a success as Game of Thrones was....but there's no way they can fit the WoT into a tv format without changing and sacrificing a lot of stuff. I don't expect I'll enjoy it for that reason. That's just me being way too picky and loyal to the source material, but if they're gonna adapt the story then I want the actual story, not a third of the story with everything else discarded or twisted up.