So got around to writing this done down. In F3 you were able to take the perk cyborg which gave you most notably poison resistants and then some normal and energy resistance boots. Even though it had no effect on charther the odea of the charther being able to becom a cyborg is there so im applying this to F4. Lastly i will note this is probably not new idea but this is just my take.
Appearance in the world
It will range from prostate limbs to close to synth in appearance. The limbs will replace existing limbs with robotic ones. It by nature very high thec, because of this, only theological suppior faction can access it (BOS, institute, gunners, etc), making it a rarety in the waste and requiring you to be in institute to gain access to first pair.
Gameplay
It would preety much be more mobile version of end game power armour, and is designed to boost every aspect of combat mostly. Because of this, it inherited the ability to be modified and many of power armour modifications. Unlike power armour, unless you fully commit to the role you would not be able to use some modifications (ie radclancers) which do come with some disadvantage
pros and con(comparing it to regular limbs and power armour)
pros
ability to modify and enhance specific limbs, allowing it to simulate power armour.
reduce fall damge
small boost in DR
Can allow more mobility option(ie climbing walls, faster speed/jump)
More mobile then power armour
Multiple pares can be kept in inventory
Cons:(all scale with more bulky modifications)
prone to actually breaking, which can be reduced but never prevented but can be replaced. Similar to synth limbs.(i was adventure like you, untill i took a mini nuke to the knee)
More weight, compared to original limbs. All the extra cybernetic put pounds on you.
Require heavy perk investment/require end game perks.
Can become expensive with raw meterial since you need to repair constantly and how high thec it can be. Also is almost always expansive to have someone else repair or get modifications.
Certion faction may despise you(your practically turning into a synth in appearance and most people aren't notably intelligent in the wasteland)or can effect your charma(similar to F2 phonix modifications for similar reasons)
Dosen't stack with power armour instead gets cancelled
You move slower in water.
