I think it's neutral.
1. Trump didn't pardon Blago, he commuted his sentence.
2. It hardly matters in the scheme of things. He was sentenced to 14 years in prison. He served eight or nine years, depending on the media you read or listen to. Either way, it's almost two-thirds of his sentence. He would have been eligible for parole in one minute, and since he is in his 60s and his crime was a non-violent crime, he would likely have been released on parole the first time he applied.
3. Trump commuted Blago's sentence. This means that his conviction remains known, so it's not like he could go on to become an investment banker after that.
4. Trump is the President of the United States. He has the power and authority to forgive or commute the sentence of anyone he wishes.
5. Blago may have been a bad guy, but he was not convicted of killing someone, obtaining life without parole, and then to have commuted. Obama commuted or pardoned 1,715 prisoners, 504 of whom were sentenced to life. You don't have life for stealing candy from babies or soliciting bribes. You get life almost exclusively for capital crimes. It’s the one that bothers me.
Personally, I wouldn't have done it, but I also don't have the information that Trump has. Blago could be sick, dying, could have paid restitution, who knows? The news reports that he was a model prisoner, teacher, tutoring, etc. He is no longer in office so he can no longer do what he did.