- Each slot is 3kg, that's 120kg total - well into the 90th percentile for weight.
- There's no direct life support option, no, but with Vacuum Environment Protection you could definitely survive in hostile environments; adding air tanks would be trivial.
- When you start looking at this sort of powered armour, the line between wearer and rider always gets a bit thin - and it's largely a taxonomical argument. Even then, that's why I added the Avatar Receiver, to let the user control the suit directly instead of giving it orders.
Worth noting that the BIACS necessary to actually use an Avatar system is TL 13, which is a bit of a problem in this specific application (though
not the concept of using the Robot Handbook for BD, I want to stress that), but I handwaved it as being a prototype that makes the process
only work for Avatars, not your own limbs, leaving you looking like XCOM's MEC soldiers.