I will probably get some flak from some of my RAAFie driver colleagues for saying a good word about FLTENGs, but I for one can't understand the apparent push to get them out of aircraft as quickly as is humanly possible.
Sure, there are high tech machines around that may not need a third person constantly sitting in the jump seat scanning the instruments, but when things go wrong (as they, amazingly, tend to do) it is of incalculable benefit to have someone who has both flight experience and a technical background to make sense of what's going on and what might fix it.
Sack FLTENGs and save the costs of training and employing them? What about the hidden costs you then incur by having to send rescues everywhere because there were no tech-trained people available to do simple fixes? If you happen to have two FLTENGs on board and a few spares, you can fix a bloody lot of different U/Ss.
It's some politically-driven hidden agenda of dubious long-term benefit, I reckon. So there!