I agree in that there'd need to be a decent reason for a capsuleer, of all people, to get combat-oriented stuff installed (at least, from an IC standpoint). Most of my past consideration of cybernetics has either been in the context of dem Sansherz or non-combative roles, though, which don't seem so relevant here. One possibility would be replacing entire organs with stronger / more efficient / whatever cybernetic replacements, though: the artificial hearts of today taken up to eleven, say.
Ze'ev, being the rogue and rapscallion he is, stole most of my shinier ideas as though they were a cloud of innocent cytoserocin, however.
The surgeries themselves, I'd
largely handwave, if only because I've no real idea how they'd be handled, particularly for any more extensive procedures. The post-op stuff, you could probably lift from comparable RL operations or common sense; as a random example, something altering the legs would lead to not being able to walk properly for
x period of time. vOv