This has been a long standing issue for many months now, and it’s just become a total nuisance and unsurprisingly the game has gone down hill due to the lack of real maintenance.
I had many presets I built on my own, and also a few that were saved from other creators, now the majority of them have been greyed out, especially one in particular that I had just saved from another creator only a week ago. With the Christmas patch introduced a few days ago I believe that is what caused the majority of the presets to become greyed out.
Now this wouldn’t be such a big issue if the game would just let you edit the preset to fix whatever bug caused it to be greyed out, but nope these presets auto convert into essentially digital paper weights.