In a regular feedback section such as this forum, such minor things tend to get lost even though they can often have a big influence on a user’s daily usage of a tool.
As an example here’s one small annoying thing that bug me when using UE4:
Ctrl-clicking and dragging a variable directly creates a get node in blueprints, which is great. However I would like this to also work when I press Ctrl while I’m already dragging the variable as I always seem to remember the do so too late. (same thing goes for Alt and set of course)