EditEmailSubject is simple and perfect. Or at least it was, before being disabled in TB68.
Like many other folks, I ask you to update this extension for TB68. The ability to modify Subjects seems so ordinary and necessary, that I'm insanely frustrated now that it's gone.
I'll also take this opportunity to apologize to the developer for not sending a contribution for your creation. I look forward to rectifying that situation as soon as it returns.
If I had known I was going to lose EES, I would have stayed in TB60.
The add-on is now compatible with TB68 as well. It just took a little longer.