As long as there is no proof, we have to assume there were no team-orders, and Fisi decided that what he did was the right thing to do. If that is the case, nobody did anything wrong, a driver may go as fast or as slow as he likes, as long as he does it within the rules, which he very obviously did.
Besides all of this, I highly doubt that what Renault "did" will change what the Ferrari drivers will do in the next two races, if the need arises. Both of the Ferrari drivers will do anything legal to make sure they secure the titles, the team don't need to issue any orders there. If they use the last race as a "precedent" for actions beyond the ethical and beyond the rules, then I hope they still get exactly what they deserve, and that Renaults "actions" do not count as an "extra-life" in terms of Ferrari avoiding penalisation.