could probably still just absorb the power probably not. that bit with Elle was a fluke. it's not something he could probably do with anyone else because he's unwilling to open himself emotionally with jsut anybody...
...although, thinking he's Nathan now might change that.
There was a guy who could change his arm into steel the chapter before last.
Nah, he got the power the old fashioned way with the shifter, just didn't go through the front so it wouldn't look like he killed him. He also didn't get Nathan's power, Sylar can sorta fly using his TK.