Outsourcing the gst-depends on internal e2 handling in external plugin handling is a small revolution for e2.
For the construction environment of you, it also means to change there.

2 ways are conceivable

1.
You patches the plugin gst things back into the image (servicemp3 ...)

Advantage, there would be no further change in the construction environment needed.

Second
It is also adapted to construction environment, actually only consistently.

Here the disadvantage, previous patches run into the void.

That's how my ideas would be.