As NF announced a renaming-tool for playernames with incremental number (only those?), I would draw your attention to an issue we have right now:
Players with incremental numbers aren't recognized by our banlist properly. A banned player "cheater" can play as "cheater (3)", so there's quite a lot of manual banning to do.
It could get even worse if the re-naming tool would allow any player to choose any free name he wants.
It would be a good idea (if it's possible in any way) to bind an unique EAGUID to every Nexus account. So all the re-naming (tool or in-game soldier names) would not affect detected cheaters as soon as they are banned by EAGUID.
In any case I would prefer if the re-name-tool would only affect players, which playernames have been changed by migration process.