The best gliders in real life are specifically built for racing. Racing with gliders is way more challenging as you have to manage your energy and properly read weather - endless fun.
Please see: Glider races would be Awesome!
where I suggest creating out of building blocks of Maverick low alt challenge glide races.
I think for any commercial add on user definable and easily online shareable tracks with online scoring system is the way to go. Any limited amount of tracks is doomed to have vanishing interest.
In best case scenario it requires anticheating mechanisms to be built-in in MSFS.
TBH Asobo is sitting on a pile of gold just sadly doesn’t know it - commercial quality add ons/mini-games like helicopter rescue missions, crop dusting, fire fighting - when implemented at current commercial games level would bring them a lot more $$$, than yet another plane model.