Alright, a Facebook discussion on Essence Holes made me realize I don't know what editions have supported Essence Holes as official rules, but 6e isn't one of them (yet). It's a mechanic I'm not sure has ever been in a CRB.
Anyway, IMO Essence holes are, in a game whose goal is streamlining, a needless bit of bookkeeping that should go away. Just let characters recover the Essence they lost. Really, what harm would it do? With as hard as street sams have been nerfed this edition, they could use a silver lining.
Since 6e doesn't feature Essence holes yet, and has very little to say about Essence in general, this is a change they could still make for the cybertech book I assume will come at some point. A small quality of life bump for a nerfed archetype that reduces bookkeeping at the same time.
Consider it, authors!