Could you provide a screenshot of the planet in question? One easy way is to take a screenshot, copy it into paint, and then use the Snippit tool to control exactly what you want us to see.

Approval is much more difficult to maintain now than pre-Crusade. I only played the Onyx yet and my experience with them may differ from yours because of race traits, but in the beginning I have a very low base approval of 1 point from colony capital (except on the home world, where Capital City gives me 6 points) what is enough to keep 1 pop at 100% approval, but that deteriorates quite fast by some formula when the pop raises above the approval level. You see that in the tooltip that is shown when hovering over"Approval" in the Colony Stats section in the lower middle.

Entertainment Center raises the approval rate by just one point now. There are some techs that give percentage bonuses, you can perhaps but economic starbases in orbit with approval raising modules (but the Onyx don't seen to have access to such modules, so I can't say for sure if the modules of pre-Crusade for that still exist), you can research techs to enhance the Entertainment Center to Entertainment Network (and probably farther, but I didn't come as far yet), you can train citizens as leaders and but them to Approval in the Govern -> Economy screen, and there are some events that give some more percentage bonuses when you take the right choice.

I hope that helps

To add on the last post, you could even reshuffle all the cities and entertainment centers. Destroy the two cities, replace them with entertainment so each is getting double adjacent bonuses, remove all the entertainment centers outside of that circle and replace them with the cities if you wish to keep the tile improvements you have.

I actually really enjoy the new farm/city/approval system. I think the big things are the following:

1) Unless its your capital or a place where you are getting really large approval bonuses, 1 city is really all you need.

2) You really have to look adjacency for approval buildings, ultimately you have to rethink morale as a major concern instead of a minor setup.

3) Farm worlds are pretty nice. One good one can handle the cities for many other worlds.

Food is now Global, not local.

Yes Approval can be issue in game now.  I have increased the base Morale (GoodsAndServices) for the Colony Capital building back to +3 from being lowered to +1 in Crusade.  I suspect Morale buildings need to be either +2/+4/+6/+8 with its upgrades or +3/+6/+9/+12.  Yes adjacency bonuses will help for Morale Buildings.  Intimidation Center (Ideological Motivation Trait Choice 1 ) also gives a +2 Adjacency bonus and +20% (was previously 50% and should be changed back) Morale bonus to its planet.

Planetary special resource Harmony Crystals gives +2 Adjacency Morale bonus.  Planetary special resources Artocarpus Viriles or Monsatium Deposit give +2 Adjacency PopulationCap bonus.   All Farm Buildings give +1 Population neighboring bonuses.  The population growth buildings (Colonial Hospital and its upgrades) give +2 Population bonus. 

Yes Stalker0 is right with the switch to Global Food Pool (great idea Stardock) it helps now to have a few Farming planets in your Empire just as it helps to have a few specialized Research or Economic Planets.

Frank999's  idea that there should be an upgrade path to Cities makes good sense too - one building per planet but not just +16 population Cap without means to easily keep morale "in check".  I believe Gauntlet in his mod had upgrades to Colonial Capital buildings (using existing Government Techs)cthat increases its initiate bonuses and neighboring bonuses including Morale as well.

I find I'm building at least two, sometimes three or four, Entertainment Centres on each planet just to keep Morale above the magic 65% number (I believe it is). It sure is tougher than it was to keep folks happy, but overall I see that as a good thing, as it was too easy before.

My main problem with playing Yor is that I haven't found out to grow fast with them. Building a new population lasts long and blocks everything. And new colonies reduce the pop on your main planet. So you are slow as fuck. Or are there techs I haven't seen yet?

Started that too... Colonies with 0.5 or 1 pop to get planets...

You need lots of social construction. A few worker citizens plus some good usage of mines and factory placement you  can crank population quite quickly.

With the yor dont worry about population untill you finish building up your planets. How are you on asteroid mining thats your main source of production. Have you thought of going tall with the yor. Lets not forget about economic starbases.