I'm not particularly in favour of a one-size-fits-all approach, because if that happened, I suspect the approach that's used at the University of Waterloo, which is inventor owned, would not be the one that was picked.
Each university develops in a different climate. Waterloo was founded in 1957 by Gerry Hagey and Ira Needles, who were senior executives at B. F. Goodrich. The university was put together with a very specific mandate to train engineers, and grew into a comprehensive university from there. I suspect that those policies of IP ownership by the individual came out of the philosophy of the original individuals who were on the board of governors of the university.
It's a method that's not tightly controlled. There's one thing I'm very worried about. I'm an ecologist, and if you look at how things work, I'm very much into diversity and, if you have a diversity of approaches, it tends to work better.