I agree. A key all bones option in scene mode would be gr8!!
Using sequence mode as a 'pose' mode is also a good idea.
Remeber that in sequence mode there is also a 'key selected bones' option.
Therefor, you could make certain punch sequences, (and/or pose sequences), with only the arms keyed, and kicks, with only the legs keyed. So your whole figure would not be affected when you add one of these sequences. (or poses).
Could be worth looking into?
PS. Hey all, i'm connectrd to the interrnet on my laptop through my phone connection.
I've had no internet connection at home for over 3 years now. So, expect to hear more from me from now on.