To the vast vast majority of people who whach F1, are influenced by the sponsors adverts etc. the details of the FIA ruling are irrelevant. All they need to know is that Renault conspired to fix a race and now the top brass have been thrown out of world motorsport. Job done. Move on.
Okay, a few hard core fans, who know what the 'FIA' is, remember details of previous rulings and see this as inconstant... fair enough.
However if the result of the FIA ruling was to remove the Renault team from the sport in the future then millions of fans all over the world would have rightly though that the powers-that-be had been ridiculous harsh and damaged the sport they like to watch on a Sunday afternoon.
The FIA ruling is the only politically acceptable thing they could have done... The only generous thing IMO is that they keep this year's constructor points and TV money. Maybe the significant contribution to FIA safety stuff will be of similar magnitude!