But your pop will cap at some point, it doesn't keep growing forever.
I mean that Population Pressure will keep affecting approval and I have no way of minimizing it's effect, as I can only build the Entertainment Network once per planet. Granted there may be some other tech and I haven't researched it.
Another thought on approval. I noticed that selecting Economic Stimulus improved approval more than Festival.
A small complaint, I noticed that after I started building a unique building like Restaurant of Eternity, it would still appear in the improvements list of other planets. I'd prefer if it was removed after starting to build one.