Thank you.
Ghost Quarter would really be an option now because Ignoble provides colored mana here. Before the print, the deck couldn't afford a colorless source.
However, I think that a single
ghost quarter in the main is very random. There is no way to look for it.
With the new prints from Modern Horizon 2, in my opinion Jund is better positioned against Tron: Dauthi Voidcaller with
Thoughtseize in
Karn Liberated, for example. Or the ramp from
Ignoble Hierarch for the turn two Liliana of the Vess.