Aces have the power to change their own topic titles, but not others'. The only way for that to occur would be for Aces to have Staff or Developer permissions limited to a particular forum or sub-forum. Whether as to Aces are granted that or not is up to the auth. I know it's possible, though I'm uncertain if Aces need a new member name/type in order to do so. For example, Staff are capable of editing all posts within a particular forum and Developers can post in the Development Blog. (Murdoc & Hukuna can edit all posts within the Roleplaying sub-forum, Kurotsune & Jan can post within the Development Blog sub-forum, etc.). It's potentially risky for so many aces to be able to edit posts within a forum, so it would be better off if we were given permissions similar to that of Developers. And even then, that doesn't solve the problem at hand: normal-class members (including Familiars and Veterans) will still be left out, though they are the ones who need editing permissions for others' posts.
To summarize, it would be difficult for this to work with how the site currently functions while still retaining the Member class system. It's possible, as seen by Mews & Annoucements, the Dev. Blog, and the Nightclub, but that would require many new Member classes, which would be a hassle to create and distribute unto members.
This is actually really curious because the idea of a "Super Ace Member" title has been tossed around before. They would include extended privileges in addition to the already existent ones. Already, that somewhat exists with the Developer Member class. As to how widespread it could be- and if it's even integrated- that is left to the auth. Again. This is a compromise that allows fewer members to have greater privileges without side-stepping into the legitimacy of being an auth member.