How does having the FE ticket relate to getting a dispatcher license ? If anything, I'd think having the ATP would be a more direct association than the FE if any shortcuts were allowed.
When I got my dispatcher ticket, I just studied on my own and took the written and oral. I was not asked by the FAA what tickets I already had, or at least, I don't remember that coming up in the scheduling or taking of the oral ( and I took it from an FAA inspector at a FSDO ). But then, maybe the FAA has changed something since 1980....nah, that couldn't be right...