-on every new day it might be an idea to reorder the players stock from high to low value. this way you know the highest player is mostly the biggest threat.
I would only do this on a particular time of the day otherwise the orders keeps jumping around and people will misclick a lot. also it gives you some historic information to since if a lower player stand first the you know he is doing less well then the day before. A new add on as well would be green/red up/down arrows as well to see their stock price have been recently went higer or lower.
You would hate this. For awhile in beta 7 the player would show up in a random order at the beginning of the game (not always on top like normal) and people would accidentally buy the wrong stock. This would create chaos having to hunt for your company all the time.
-on a map with a lot of players and a lot of sabotage it is very hard to keep track. perhaps a better notification and click-to-event button for when YOU are attacked would be nice.
You can already click on both the pop-up event as well as the event in the chat log to see where the sabotage hit. The clicking on the pop-up is new in beta 8 i believe but the clicking in chat has been around for awhile.
-on a resource tiles where a factory is build a better visual when there are resources under it would be nice even tough i can't give you a proper suggestion how to make that a bit pretty as well.
Not sure if you know about it so I'll mention it. press the Z key and you can see what resources are underneath buildings (i forget to do this myself about 50% of the time). Other option is to look on the pop up if you hover over the building. It says "unused aluminum" although I don't remember it listing all the unused resources if it's a multi-resource tile.
Hope this helps!