Sovreignty Resources Just Not Worth It

For all the excitement I felt over Sovreignty, I feel disappointed.  As far as bonuses to production goods and unit, it is still cool and I like it, but when it comes to resource bonuses, it's a bit of a let down.  A measly 2, 3, or even 4% just isn't worth the 100gp an hour upkeep.  I keep hearing that it will be beneficial when I am larger and I have like 6 or 7 cities.  I'm not satisfied with that answer.  First I don't see how (though maybe), but more importantly, Sovreignty is such a cool concept, why should players have to wait so long to use it?  Getting that many cities could take months.  I think resource bonuses should work like production bonuses and the min should be 5%, then add the bonus already given.  Most players would then see some kind of benefit from having at least one level 1 sovreign square.