Faulty Copy Functionality on Connectors

I have never known any version of Keynote to allow copying of a connection line, can't imaging why you would want to this as lines are added to specific shapes:

To add a connection line; between two objects; select both objects (command click) then Insert > Line > select the required connection line: straight curved or angled, the two objects will now be connected.

If you want to change the line style of a number of lines: change the colour, line style and stroke of the first line, then use the copy style tool (option command C) then paste style tool (option command V)

I agree with the OP. To add a line with copy and paste is select one object (connector), command-c, command-v, reattach to objects, nice and easy and no need to go into the menus. The way it needs to be done is much fiddlier with select both objects, go into menus and submenu and then reformat afterwards. Not much fun!

I agree with the OP

Except it's not a bug.

Yes your suggested way: 5 steps and does not work

Keynote way: 3 steps and works perfectly. Wheres the fiddling involved?

Fair enough, it's a design decision not a bug. I just find navigating into the menus, especially submenus to need quite a bit of mouse / trackpad dexterity that slows me down (the 'fiddling').

I've found out that I can create keyboard shortcuts within the Mac preferences though, which hopefully means that I can quickly add connectors without having to do lots of menu navigation with the mouse pointer.

YES..it is a bug because it didn't do this before. I did this many times prior to this update and wasn't hallucinating. When you create a new line, it does not adopt the styles of the previous one. So, if you had a line that had specific styles (weight / different endpoints / shadow / color) on that connector line in which you'd like to use on another slide, it used to be that you could copy the connected line and paste onto a new page (now unconnected of course) and then simply drag/connect them to whatever objects you wanted to. It was very convenient over creating a new line and then reconfiguring all the styles.

Now, you must copy both the connector line and it's connected elements. Then disconnect and delete the unwanted objects and then reconnect the line to the new elements.

So yeah, I see it as a bug. The other option is to create a line style but I would still rather copy/paste.

but I would still rather copy/paste.

Then copy the style of the connection line using the copy style button (option command C) and paste (option command V) on to the new connection line

I agree this is annoying—I used to duplicate connectors with Alt+drag and connect them to new objects.

The best workaround I've found is to insert a disconnected connector, make several copies of that, and then connect them individually.

Agree that this is extremely annoying. Duplicating connectors had made this the fastest program for creating diagrams—my secret productivity weapon. Now that it's gone there is no reason to use Keynote or Numbers for creating diagrams. Back to OmniGraffle (ugh).