Hmm, not really sure I follow exactly what you’re saying. I entered the game with Dorco 2 (on trial) and Dorico 3.0 (purchased), so don’t have the historic perspective.
To clarify where I’m coming from (and this has been discussed on this forum before): in my belief parts and scores should always be the same, unless the user explicitely rules otherwise. So if I type in a gradual dim or change an existing one, I would like to have the option that it automatically updates all the other layouts (unless I specifically ask not to). In Dorico 3 you had to “propagate properties” every time (in stead of that being default behaviour), and now you seem to have to click global everytime. That’s not really the change that I hoped (and asked) for. Personally, I think “my way” should be the default behaviour anyway, but failing that, at least there should be a user-preference to make certain properties global by default.
The downside of this (and the previous) version is that there’s an extra key-click involved, and worse, if you forget to do that, things become very difficult to unravel, particularly if linked dynamics come into play. The progress that I do acknowledge is that gradual dynamics no longer behaves as a toggle (in the past, if they were different in two lay-outs, if you changed one, the other changed in the opposite direction!)