Would you bet a thousand bucks, or even a beer, on that?

Only the totally obtuse and blind would refuse to see the role crafted for Egwene in the LB. That Illtempest loved you for that post should tell you something. This was the woman who thought Egwene would collar Rand with the male a'dam when he came to Tar Valon and make him use Callandor, lead the circle of three and defeat the Dark One, all the while making Rand her slave. Or some such bizarre notion.

Your own ideas, while more reasonable sounding, are equally absurd given the direction Jordan took with the character. If you need any proof for Egwene's great role in the next book, you only need to see Brandon Sanderson's quote that Egwene PoVs in aMoL are as numerous as for Perrin and Mat, and that this was unsurprising, since she was one of the main characters. She is clearly going to form a solid part of the next book, and given the high chance of TAR being involved with the finale, and also the myriad of foreshadowings that she will be asked to kill Rand, there's about no way she's dying before the very end, if then.

As for her as a leader, here is what Brandon had to say:

I was most fascinated with Egwene's progress as a leader through the entire series. And the things I was allowed to do because of what Jordan had done in Knife of Dreams and the set up in previous books, and then what was in the notes, was really exciting to me because she was able to come to encapsulate what a leader really is, I think. There are some great scenes in Gathering Storm that I got to be part of, where, you know, we've had Aes Sedai acting kind of as bullies, some of them. And we've had various people through various factions acting as bullies. And there has been this sense in the Wheel of Time that people believe that might makes right. And yet it doesn't, and the books imply that it doesn't. And Egwene is the first chance we've really got to see of someone with no might making an even better right.

Now, I'm not saying an authors opinion means you need to change your own, but this flies in the face of your idea that Jordan set Egwene up as the example of a bad leader, which will end with a spectacular fall from grace...

Consider this, too, for what its worth:

Loialson:
In Lord of Chaos, Nynaeve and Elayne searched for something that would tie the Salidar Aes Sedai to Rand via Need in Tel'aran'rhiod.

Need led them to three things. First it led them to the White Tower, (where Elayne glimpsed Egwene briefly), then Need shifted Nynaeve and Elayne to a locked storeroom within the White Tower (they thought that was useless). After that, Need led them to the Bowl of the Winds. My questions are regarding the first two things Need brought them to.

On the first thing, was Need bringing them to Egwene?

Brandon Sanderson:
I believe it was Egwene.

And:
Brandon Sanderson
PRK (7 APRIL 2012)
Brandon tried to get moments for every character in A Memory of Light. Egwene is ready to be bad ass in the Last Battle; her character development is done.

So, yeah, continue believing Egwene is headed for a fall and will soon die a broken woman. The author himself disagrees, and the books do too, but none of those has ever stopped a dedicated hater of Egwene before...