There is quite a lot that can be done solo actually, it's just extremely slow and uninteresting but not impossible. Light (frosted protean) grind can happen solo at least which is better than doing nothing if having trouble finding a party with the same objectives for hours. The louhi ice will probably be nerfed by making it available from an npc since they set a precedent by doing that for pazuzu feathers. Light gains will likely be nerfed (increased) eventually.