Fans have done everything short of renting a plane and skywriting it: There's a huge group of us that like Wally West and a huge group of us that like Stephanie Brown, and we want to read new stories featuring those characters.
Wally West might not be your favorite Flash. Wally, you say, might confuse new readers. If you have to give him a different codename? Cool. All we want is Wally.
We want the mythology of the speed force, we want a sidekick that has grown up and surpassed his mentor's legacy. You still have Dick Grayson, you still have Roy Harper, so there's really no reason we can think of, no story reason to not have Wally West.
And that brings us to Stephanie Brown. Yeah, she's a troublesome character, and yes, in the scheme of a "five years old" DC superhero landscape, that means she was Robin for about 12 minutes. But darn it, Stephanie sure as hell is Batgirl. Stephanie Brown brought back some of the wonder and awe to being a superhero without superpowers. She wasn't invulnerable, and you actually knew it (which is sometimes lost in Batman stories). She wasn't perfect at her job, but she was trying her hardest and getting better all the time.
Barbara's back as Batgirl? Awesome! So give Steph a new identity, or just let her continue her training under Babs. Heck, you even had the option from Grant Morrison of simply sending Steph to another city, setting her up somewhere in England.
Please DC, hear our cries: Find a place for Wally and Steph. (Lucas Siegel.)