Every other Precursor has universally useful relics/bonuses/resources from completion, except for Zroni... Zroni is COMPLETELY useless unless you want to take psionics, and it kind of forces you to do so (since otherwise, the relic and bonuses are useless). For everyone else, you get a useless system ( Zro you can't harvest) and a mediocre relic. (+20% Ship Damage for 5 years, or a tiny amount of Ruler XP, or +5% stability when activated. Yay?). It just leaves a sour taste in my mouth. You could also argue the same about Baol, since the gaia-seeding is useless for machine empires. So, I say restrict Baol and Zroni to biological empires, and Zroni restricted to non-gestalt. Otherwise, not sure, maybe give the relic some useful passives for non-psionic empires?