I have already think to add continuously shooting as a opinion in timed mode. I'm not sure about time table for it yet, but probably in next big release it is in there(0.8.0).

About focus button, I don't know is that possible at all, but currently I can't add it. Because there is no IR signal for that possibility in any of configure files for remotes I use (they are only ones). Still, I have some small memory bites (about the time I worked around with remotes as searching info), that in some of those remotes had that half-press function to focus, but it isn't in the configs I had, and because I don't own real remote (reason why I started to work with pyKake at the begining), I can't do configs by myself. And anyways, if there is possibility for this tomorrow, it may still wait till the 1.0 is out.