So this is what we get and it all makes sense now:
Let us starve for G/A souls for months as they
- were (almost completely) removed from sac rewards (again: the last 3 sac events together gave me 0 rare G/A souls with 1 exception: a vortex gave me a total of 5 or 6 G/A souls),
- removed them from Arena rewards,
- strongly increased the needed amount of frags to claim a G/A soul
- release several new G/A characters

just to bring such an sac event to get assassin frags and souls. So we can expect the next sac event to give the same stuff for gunners? I actually hope so because of the reasons above.

Simple principle for control and regulation:
- make a resource scarce
- make a resource important
- strongly limit the sources for a resource

I know, complaining does not help and this post should not really be seen as a complaint. Just saying that we see what you did there.
Sure the event also has a certain beauty, as it gives us the chance to stack up souls etc. if we want (and can) alongside our tries to get missing characters. But the "beauty" is only there, due to the lack of alternatives.

Good luck to all of us in achieving our goals!