He did his time.
If you want harder actions we must be much better att detecting cheaters and those helping them.
Otherwise it will just be for show and hypocritical. We will be celebrating cheaters and further penalize those who have already taken their punishments just so we can show that we are against doping and feel good about it.
Maybe he really did deserve a tougher sentance maybe not. It is what it is right now. I think anti-doping is slowly getting better but is still very much a work in progress.