I feel like I've mentioned this before, but didn't find it with a search, so I'll put it down here again for certainty.
I'd really like to be able to add conditionals like the triggers have, to action groups.
I have some action groups that I like to execute only on a given set of conditions, and maybe have multiple ways of triggering them. It makes sense for me to pile that all in one big action group, and then just build the few triggers to call it, rather than have to build several triggers, all with the same set of conditions.
It's also handy with respect to calling action groups from outside of Indigo. (i.e. using Home Remote to call an action group which I may only want to run conditionally).
It seems right now that the only way to do this is to make an action group, then an other action group which is just a python script that calls the target action group based on some conditions, and then having my external trigger reference that second action group. It's all just kind of inelegant.