something quite annoying is when you lose a leg and move incredibly slow and its almost a guaranteed death if you lose a leg.
A way to fix it is that similar to customizable armor (If it will be added) that you build yourself, you build back the limb you lost(Maybe you have to spend an upgrade point to be able to repair idk). And as you progress in the game you unlock new parts that can for example increase your movement speed. I think it would be very useful in endless mode so that you can actually have a way to heal yourself if you lose a limb or take damage other than using clones