Ok. My only major complain is this:
The menus. Please. Why. Explain to me: why all these menus?
Wouldn't it be more convienient and faster to just be able to sell stuff right from the Assembly menu? Why do you have to go to the Sell menu to sell stuff?
Another thing, but please, read to the end to understand what I'm proposing here. Since the economy of this game works like it does (you can refund parts for 100% of the price you paid), why do we even HAVE to BUY anything? Here's what I mean: Imagine that your whole budget is 1,000,000 credits. You buy stuff for those 1,000,000, then you do a mission, make 200,000 and decide that you want to swap, say, your torso. But the new one costs 300,000, and you only have 200,000 atm. So, what do you do? You:
1) Open Sell menu.
2) Sell something for at least 100,000
a) Pray that you won't have to sell your currently equipped torso to make those 100,000
b) Whoops, you DO have to sell your equipped torso to make that money
3) Go back to the Assembly menu
4) Find the torso and unequip it
5) Go back to the Sell menu
6) Find the torso, sell it
7) Go to the Buy menu
8) Buy the 300,000 torso.
9) Go back to Assembly menu
10) Find the torso and equip it
That's a lot of steps for what was actually done here: swapping one part for another.
Now imagine that instead of all that, you only had to do this:
1) Go to Assembly menu
2) Find your equipped torso, unequip it
3) Now find the 300,000 torso you want
4) Equip it
"????? What? So you wouldn't have to buy stuff???"
Nope. But here's the kicker: now it's the EQUIPPING that COSTS MONEY. Let me explain the most important thing in this other system: imagine that instead of just earning money, you would add your hard earned money to a, let's call it: "Budget Limit". What would this Budget Limit be? Basically, a total sum of all the money you've earned throughout the game. So if you earned 500,000 credits in total so far, this would simply mean you're allowed to equip ANY parts the "shop" has unlocked for you thus far ("" because there is no longer a "shop"), as long as you won't exceed your 500,000 Budget Limit. This essentially removes many steps from the process of swapping equipment, while not changing anything in the balance or gameplay department. It just speeds up preparation, makes it seamless and most importantly: lets you focus on what's actually important.