In other words, you want Pd to include "meta" capabilities enough that abstractions have all the functionality of coded objects. [initbang] would be one step in this direction, but there would be at least these other requirements:

1) The ability, in vanilla, to dynamically delete individual instantiated objects without "dynamic mousing."

2) Left [inlet~] that can take messages like [bang( or [stop( and pass them.

3) [inlet~] that can output a settable constant signal upon creation (imagine if you wanted to create [tabosc4~] as an abstraction using a [phasor~] and a [tabread4~] -- there isn't currently a good way to connect the [inlet~] to the phasor and also have a default frequency creation arg).

4) In some cases, access to name of the parent patch could be helpful.

Matt