Even though it is possible to import a profile from a previously generated gcode file, the way how to do it is cumbersome. Consider the following workflow:
Apply profile "normal"
Customize settings for the specific STL
Export to gcode
At a later time, assuming you printed other objects (read: changed settings), you edit CAD and create STL-version1.1
Now you have two choices: Go to step 2 and redo custom settings
Import profile from gcode_version1.0 and apply it
While the first option is usually not the fast way, the second might be the right one. BUT I don't want to have a profile imported for every part I reiterate through my design process. And since 3D printing is a lot about prototyping, there must be an easier way to re-apply print settings without clogging up the profile list. So here is a list of possible solutions:
Add a button labeled "Load from gcode" next to the profile dropdown.
Long story short: Alongside the import functionality, one should also be capacitated to just load settings and thus keep the list of profiles nice and tidy! From a programmers point of view, most of the functionality (retrieve settings from gcode, apply them) is already there, what's missing is the right implementation in the GUI aka DnD and / or button.
Cura 2.5 ROCKS by the way. Love the new "Layer view mode" and also searching in settings is super handy. Amongst the tons of other things I like about the software. Outstanding job!