Myself, I find it a rather major credibility gap that you can pillage a
city, let it rest a turn, pillage a city, ad infinitum. I am surprised
that you are allowed to re-enter the city following the pillaging, i.e.
that you are not turned away at the gate. And that this barring is not
atleast for several game years.
This again is probably too radical to fix for g1, but seems reasonable for
g2. It throws off the plans of the empire-builders too much, and their
expected sources of income.