Trump has been able to do very little, and this is a good thing. However, what he has done is effectively demonstrate that the executive branch has too much centralized power, not too little.
In regards to whether or not it would be great if we had a powerful centralized body that could determine what constitute outrageous lies worthy of a fine, no, for the reasons I've already stated, I do not think that this would be a good thing. I have no problem with European and Asian countries granting their (very often highly competent) governments greater authorities than what is afforded to the US government, but I think it's supremely important that there remains at least one superpower fundamentally predicated on a mistrust of a central authority.
Trump has accomplished much more than you think he has. He has done a good job of using controversy to divert people from a great deal of the significant changes he has made via executive authority to the various government agencies under his control.
In regards to whether or not it would be great if we had a powerful centralized body that could determine what constitute outrageous lies worthy of a fine, no, for the reasons I've already stated, I do not think that this would be a good thing. I have no problem with European and Asian countries granting their (very often highly competent) governments greater authorities than what is afforded to the US government, but I think it's supremely important that there remains at least one superpower fundamentally predicated on a mistrust of a central authority.