We'll have to wait and see if the momentum continues with Jay, but Scott Snyder has talked about writing Justice Society in the future, and Doomsday Clock will be wrapping up very soon.
Wally has been used consistently since his return in Rebirth. He was a core cast member in Titans, then featured prominently in the "Perfect Storm" and "Flash War" arcs in The Flash, then was a key character in Heroes in Crisis, and is now starring in a 6-issue mini-series.
You can argue about how well the character is being written and utilised, but he is appearing on a regular basis.