You might want to consider posting to the flightgear developers mailing list to gain access to the fgaddon repository, which is where "standard" addons are hosted - this would ensure that your addon can become a part of the fgaddon repository, which may ensure that the flightgear developer community can help maintain your addon should you not be around, but which would also mean that you could help maintain addons whose original developers are currently not around.
At some point the primary contributor to the addon system considered adding support for "default" addons, i.e. addons that may optionally be shipped as part of a FlightGear release, and that may be installed inside $FG_HOME or shipped as part of $FG_ROOT - given the quality of your addon, it would seem like an obvious candidate for inclusion eventually.
So, if in doubt, I'd suggest to post to the mailing list to introduce your addon to the FlightGear developers mailing list, many of its users are not necessarily regular users of the forum - which is to say, you'll likely receive additional feedback/testing by introducing your work there, regardless of fgaddon access.