I'd like to complain about the parts selection menu. I've been playing this game for a long time now, yet i can't get over how counter-intuitive that menu is. That problem has been further emphasized with the games growth.
Firstly, the order makes no sense whatsoever.
In older versions you had a kind of color-coding going on, and that helped a bit:
By the texture styles, you could instantly recognize which part is of which diameter.
Now the current menu. Let's say i'm selecting a rocket tank:
The order makes no sense, and there's little to suggest the part's diameter. I need to go through each tank until i find the correct one.
Previously, the challenge was to design your rocket, and navigate outer space. Nowadays, navigating the parts menu is a challenge and a mini-game in itself!
The problem would disappear if for example, the tank selection, looked like this:
p.s. i know about the part categories/filters. Maybe i'm just being thick, but all they do is make it difficult in a different way.