I think I made a similar topic before, Ash basically comfirmed that you'll eventually be able to click on the object area of an action/condition to quickly swap it.
<img src="https://dl.dropbox.com/u/1024727/c2/objectswitch.PNG" border="0" />
Which should be faster than the back/next thing.
(Would be cool if you could just click and drag those object parts to replace other objects even faster, like how Clickteam's event system does it.)