Optiom number one sounds interesting and it would give additional challenges to the writer like making his ability to love heal during his life because of the love potion causing that ability to "wither".
You could have Gilgamesh possibly claim the mothership as a new treasure or have him ve confeonted by the TVA or a similiar oeganization because je Is meddling in the "fate" of the world and its heroes.
Man this has been a surprise a welcome one ať that! Even if je has less power he can at least do lesa paperwork etc. and has more time for himself and his ambitions.