that cam isnt that bad seen alot worse
my mrs old xr2i cam was that bad that one of the lobes was near ROUND lol, it started missing so i give it beens as i though it was just running rough anyway after 2 days of driving around i took the rocker cover off.
one of the tappets had completely colapsed hense the thing missing. changed the cam, tappets and gave the head an overhaul and it was fine.