My personal opinion in this one might have been stated multiple times, but I think there is no need to stay on 1.18.2 if there is a newer version full of content. 1.19 added an entire new biome called the deep dark, and people have already been making mods around it. I know it is sometimes easier for some modders to not update and stay on older versions like 1.18.2 or 1.12.2, but I think that changing to 1.19.2, which is right before 1.19.3 - a road block for the new versions, is the greater idea. So I vote for it to become a new LTS for forge.
UPD: A thought just came to me, that most people have already updated their important for modpacks mods to 1.19.2 and actually it adds a +1 coin to switching to that one as LTS.