His motives are outside what people would define as good or evil. Vivec himself has confessed that his mortal self killed Nerevar, no one disputes that. The ministry fell because people lost faith in him; he could have saved it for sure, but as I said, CHIM is outside subjective definitions such as good and evil.
I don't think that works. It's not impossible to judge Vivec's actions as good or evil because ... you just can. I mean, that sounds circular, but my point is that with that much power - whatever the source - his actions do not lose a moral dimension, and I certainly suspect that friends and relatives and countrymen of those who died at his hands or neglect are certainly not wrong to judge his actions to be evil, if that's how they view it. Since it's subjective, it's not remotely possible to start drawing borders where concepts of good and evil are no longer applicable.
"His motives are outside good or evil" actually sounds like a huge copout.
Whether such concepts actually achieve anything worthwhile is a different debate.