Is it just me, or are Luke's super powers a little unclear, and am I the only one who notices and cares that they seem to scale to whomever he is fighting?

In his origin and early days, as we have seen from storytimes, he gained impenetrable skin. But bullets still rightly bruised him, as there is more to a body than skin. Plus, punching through stone walls should still break bone and be beyond 'such and such pounds of muscle'. So, he seemingly always has a little super strength, but only when convenient.

In recent years, he has fought some pretty heavy hitters in Avengers titles and Civil War. People that really should be far above the paygrade of someone whose claim to fame is not getting stuck when you stab him. They certainly seem to have left impacts still doing deeper damage far behind, or else he would be long dead.

I liked that in Jessica Jones a shotgun blast didn't break the skin, but the force still fucked him up.