I'll submit this horrific thought to you: what if they never get revealed?
Hard to do. You see, it seems from a number of sources that Nixon was just as Gov. Pat Brown came to the realization when facing each other in 1962: "I was worried. Here was a guy who went all over the world to visit world leaders and with me just getting by. Then it came out that instead of being attractive, he was the opposite, what ever that is." (quote approximate to memory).
Or as Nixon said of himself said, 'an introvert in an extraverted profession.'
For these and other reasons, he would have always been a lightning rod to much deeper investigation. Facts are, it is not that difficult to put together original and ground breaking research, especially with the help of a great memory track, more so the library of congress or now with the internet. I have done some pretty ground breaking research myself of famous people, parts apparently never put together before which was endlessly gone over by the media (not a politician of my best work, but a public figure who was tarred horribly at a very young age). We will see if it is ever found fault with, as it has been going on a decade now.
With those deemed 'right' and 'popular', it is easier to slip something under the rug. With those deemed 'bad' or good fall guy, it is the good or saving grace that needs to be gotten out. To really see history is to see all the blemishes and angles and good points (with those who are ill famed, usually with very accurate reasons).
Nixon was his own worst enemy, and most certainly was a complex and with a pronounced dark side, though his methodological (method-- illogical?) and telegraphed bark was much worse than his bite, though neither was that nice on average. As a successful politician with keeping secrets, one normally does as reported of 1948 Chiang Kai Shek "kill them all, keep it quiet" but in smaller scales, not to do a Nixon and openly in cabinet meeting etc. mull over issues and never seriously thinking of doing the ultimate. At the time, lots of liberals had quite valid reasons to expect the jackboots ready to march.
At the level of a modern US presidency with an adversorial electorial system, at least psychologically/verbally, every politician even Carter uses lots of ways to put streneously and at least some what heavy handedly put down threats, or has since Calvin Coolidge or maybe Harding. Everyone is either a threat or a tool, to some extent as the saying puts it with politicians. It looks bad, very bad to do things as Nixon did, almost amateurish as in H.L. Meneken's 'Not much is worse than the situation when a good boy becomes corrupted by the world' (meaning he does not know what is being dealt with or the safer limits. And much was done by order and worse by insinuated order in Nixons presidency.
Were it not for his accomplishments (Detente, first known to be mulled over in 1954) and some other issues of complicated sorts, he would entirely deserve without reservation many of the charges against him as one of the worst presidents wholly inadequate to the times. If he got away with it, by some chance, it might encourage others to follow in the footsteps, but I wonder. Politics has never been bean bag. That said, this subject belongs to those who have two or three lifetimes to research the subject from nearly every angle, much more complicated than my more limited research subjects..
President Spiro Agnew worries me. No telling if that would lead by example to just as some posters here suggest. It could have happened, and the man was popular with the right wing no question about it. The trajectory of the Nixon administration would have been latched onto by Agnew AFAIK.
So to put it in another way, if Nixon got away with it past leaving office, it could have easily laid the ground work for an even greater epic flop like Agnew (if he really was that bad. I only have what a variety of people had impressions of him, like Casper Weinberger.) At that point, far more political stones would be overturned, to find where the bodies lay. But damage control is much easier after out of office and stautes of limitations a big issue. It smacks of vindictiveness and is a bad precedent.
That is my impression for what it is worth.