I would call it a slow evolution, but I am sure there are examples of phases.
For example, Brian Silva went from the Geoff Cornish influence of his mentor to mimicking Raynor.
Pete Dye's work went from minimalist at Harbor Town to grand scale at PGA West. Now, the new Golfweek shows he is also following the trend to low profile.
As I mentioned once, Doak's work appears to be getting less rough edged and more polished in subtle ways. He is also branching away from minimalism when necessary (Rawls Course)
Art Hills has (IMHO) improved his bunker style by flashing them just a bit for visibility and incorporating some blind shots, funky holes, etc.
Look at Cimaron Hills (low profile) vs. Jack Nicklaus' early TX efforts with chocolate drop mounds.
There are any number of gca's who have upgraded in the 90's from a practical style to their version of "The look". Hurdzan is the most visible example.