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I don't see any issues with the electrodes. These plugs work pretty hard in the S65 (lots of revs, high temp, etc.). In my younger days, I probably would have cleaned these off and just put them back in for another year to save the $.
However, there is one item on which I would like to comment. Plugs 4 and 5 (going left to right) seem to have a lot more discoloration on the threads than the other plugs. Were they adjacent cylinders or opposing cylinders? Was there oil residue on them when you removed them? I am guessing 'no' by the appearance of the electrode, but it might be interesting to make a note of which cylinders these were in for the next time you change them out.
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