On the mass damper issue:
When Renault introduced the system, they did not present it to the FIA. They did not have to since the rules say basically "if you think it's legal, it is". Renault thought it was legal, hence never presented it.
This rule remains true until either the stewards or another team bring the issue before the FIA. Again, the stewards never did so, thus the FIA had for quite a while no reason to interact, after all, until the protest came, the device was basically deemed legal.
However, when McLaren (and pls do remember that Dennis isn't the biggest fan of Ferrari) presented the issue to the FIA, it finally had reason to decide on this issue. So there is really no conspiracy on the timing of the decision, it's just a result of rules that are pretty liberal but can bite you when you wrongly (in the eyes of the FIA) judge the legality of a device.