I find much to disagree but there is some room for improvement.
I think some oversight or setting standards and best practices and maybe a little of what NGO's do for underdeveloped countries where they don't control the election but have some federal officials which "witness" what is going on. And maybe not in *every* district just problematic ones or random ones to see if there are issues.
The risk is that if you set up a federal election system then you *can* have control and fraud on a national scale. Right now it is so disconnected with different structures and voting booths, etc it would be practically impossible to do coordinated fraud. We have local city, county and state governments for reasons and there are reasons to not have 100% central control of government. An analogy might be the school system. Do we want or require the federal government actually run all the schools in the country? Likely not, but they might be able to help do some oversight and help without actually taking full control. Side observation is that people (parents) seem a lot more motivated to make sure *their* child is being educated well than the average person is involved with voting and local government.
IMHO, the current POTUS doesn't have the proper respect for data and nuance of collecting all the voting data from across the country to be the right person to do the job. The initial missteps of the voter suppression commission he created seems more about throwing something together quickly than really doing a good long term job. It seems like they are going to throw a lot of data together than should be carefully handled and might take years to properly merge. The commission will end up with lots of dups and anomalies which will be taken as evidence of the fraud and abuse they want to find and used to justify a bunch of voter suppression laws.