I've found 4 major things in need of a fix:
-Station Spawn distance (It's back in Rising Tide, and now they can appear at sea too)
-Revival of Old Ultrasonic Fence (It does basically nothing now, and seige worm/Kraken always ignore it)
-Rebalance of Ratio of Strategic Resource Amount on land to at sea (There's making the water gameplay relevent, and then there's removing land gameplay relevence, and this is the later)
-Fix for New Capital Razing problem (And maybe make original capital razable as well)


Going into the Stations:
-Set Spawn Distance to 9+ tiles away from any city please


Going into the Ultrasonic Fence:
Either
-Restore the Old Setup to completely repel
OR
-Heavyly Boost the "Discouragement" of aliens entering to the point that nothing would enter unless the aliens are at the "Orange stage"

What would be really cool is if the fence's effect strength could be tied into the set difficulty.


Going into the Strategic Resource rebalance:
-Buff Amount per site on land to between 4-6, and double occurance of strategic resources used in Affinity Units (Mostly Firaxite/Xenomass/Floatstone/Titanium) on land
-Nerf Amount per site on water to between 5-7 average (will preserve feel of faster pace), and quarter the occurance of strategic resources
-Note that this is only in regards to Strategic Resources, the rest of the resources are quite balanced
-Also preferably make Alien nests only appear on Xenomass again, and maybe appear less

Going into City Razing Fix:
either
-Fix how when you capture the Original capital of a CIV, the new capital won't be razable
or
-Make all Capitals razable, including Original. (Might cause problems for Domination Victory condition running right, since it keeps track by captured Capital)