The adjacency bonuses are pretty obvious, as they should be. The decision points come when space is limited and you need to choose weather to give up an adjacency bonus for a different kind of building that would help your planet, and also when to give up a tile bonus for an adjacency bonus and vice versa. The former will be more important if they make it more important to build approval buildings, but there are also influence buildings, military, and trade buildings that will likely make these decisions more interesting.

Also, the production bonus for approval is working, there just isn't an easy way to see that it is. If you do the math, it is being factored in.

I also agree it would be nice to unlock in the 'sensors' line of tech the ability to see the planets tiles PRIOR to colonization if possible. This would really go a long way to helping optimize my empire or give priority to colonization. 

Also I am not sure on some tiles value. For example I would lay down a factory on a 'Soldiering/Defensive tile if that planet is in my inner core of impossible to invade worlds at first. 

Also there are tiles which give a bonus to wealth and another (which is more common) to Tourism. I would like to know how much better it is to research tourism techs. Also what are tourism buildings? As Altarians I cannot find them or perhaps I am not seeing them. I would appreciate a quick pointing and a name of the building. 

Tourism over putting down a research lab? hmm. Also I notice that you STILL get some benefit of the bonus even though you do not have the proper type of building on tile.

Ok, however it 'seems' that we would actually make MORE money via tourism and trade than trying to do straight wealth via direct tile bonuses. It worked that way in GC II and hope its like this in GC III. 

I imagine but not sure that if you have 'trade routes' from a planet with Tourism bonus tiles and tourism improvements on it, it would make MORE money than a route that is say just from your capital to another empire. 

In GC II I would focus ALL of my routes out of my capital and then surround the planet with trade+production star-bases to maximize wealth production. 

I suspect that with the new system, you can still do that but originating trade routes from these 'tourism' improved planets will net you more wealth. 

I suspect overall you have the right idea. It makes sense that tourism would generate wealth. Perhaps it will give influence benefits as well. That being the case, breaking trade routes/open borders would really hurt. Not that I am against it, as it makes sense. I prefer they do something a little different, like capping starbase benefits, so you can't just build multiple starbases and have all trade go through them. That seems, to me, like an exploit. 

Also in GC II a common tactic was to immediately initiate trade (researching trade) with a belligerent Jerk like Kona. This would  generate revenue for both of us and also give diplomacy 'weights' (for nonaggression)  on whether he would declare war on me. He sees me as week but at the same time I am helping him fund his war machine. This prevented a lot of wars with him till I was able to field a fleet and deal with him.

I hope trade and tourism also play a (significant) role in diplomacy and relations as it should and does in the real world.