1. Blueprint Icon: I understand the idea of this one, but at 1440p, it's difficult to make out the empty squares, and it just doesn't work well as a represenation. Suggestion: the letters "BP", or an open grid.
2. The Bonuses Icon: The arrow's side tips are so tiny, they're almost invisible. I suggest a more robust looking arrowhead.
3. Farming Icon, represented by a bale of hay...
![Razz :P](./images/smilies/icon_razz.gif)
4. Logistics: the icon is clear, but every time I see it, I think "Phone coverage!" My association with that overlay is robots. That icon doesn't say "bots" to me. I much preferred the roboport icon because that's exactly what the coverage shows. I am aware that the Logistics system shows the contents of special chests, however, 99% of the functionality is performed by robots, whether constructing arrays or logi bots delivering stuff around.
5. Pollution. I understand the skull, but I think a smokestack emitting a few puffs of smoke might be more evocative. After all, the player doesn't die of pollution...