You can't do infinite Xenology Studies anyway. It resets to 0 when you get to 250. 
I've had games where I had lots of cities on Nona. And actually, the Dondasch doesn't show up in every game (at least not for me).
Something else that's irritating: when one of the three alien Civs has a tech I need but I don't have the time/money to arrange to steal it, they wipe each other out in the meantime... They can be extremely aggressive with each other, and utterly stupid when fighting the Nona barbarians.
However... if I recall, Collective Government means less civil disorder. It also means slower tech, but I offset that by building as many science boosters as I can, and converting as many citizens to Einsteins as I can (without starving the city). Sooner or later, the rate of tech advancement will increase dramatically and it's nice not to have to worry about civil disorder.

I've had games where I had lots of cities on Nona. And actually, the Dondasch doesn't show up in every game (at least not for me).
Something else that's irritating: when one of the three alien Civs has a tech I need but I don't have the time/money to arrange to steal it, they wipe each other out in the meantime... They can be extremely aggressive with each other, and utterly stupid when fighting the Nona barbarians.
However... if I recall, Collective Government means less civil disorder. It also means slower tech, but I offset that by building as many science boosters as I can, and converting as many citizens to Einsteins as I can (without starving the city). Sooner or later, the rate of tech advancement will increase dramatically and it's nice not to have to worry about civil disorder.