I haven't read those issues, she wasn't fleshed out in the 14 issues prior to her book(I'll be generous and leave out the 7 International Iron Man issues, even though that was really the only part of Bendis' run with any actual story). Why would I want to read about a character that the writer couldn't' even bother to give a good setup for taking over after erasing the normal cast, the characters I bought the book to read about, from the book? When the announcement came that she would become Iron Man she...built an armor based off a schematic she found online, then Tony met her and said she's awesome, and that's it.
How many of those characters are still around or even recognizable characters that people care about and not just footnotes?(Seriously, Teen Tony, the previous worst part of the Iron Man series?).
The same criticism applies to the Doom book to, it just comes off as Bendis' wanted to write Doom and that's it(I don't read that book either but I looked up the explanation for why he's calling himself Iron Man, its not good). The only reason that gets more of a pass is because people like Doom and are just happy he has a book, and seems like would lose nothing if you changed the title/Doom's armor(though somehow I doubt that book will be well loved by the end of it's run).