For people who haven't been playing the game long, there's no need to worry about searching for stuff for upgrades. What the engineers need will be found during the activities they've always done to get money and upgrade their ships. The problem is more for those that have been playing for thousands of hours to already have every previous upgrade available. They now have to go back and repeat all the things they did in the beginning to get the stuff for the upgrades, only now it's a lot more boring because after the excitement of a difficult kill, you have spend a lot of time scanning and hoovering up the debris left behind in the false hope that you might find something that you need. Add to that, hours of mindless scanning of USSs in the hope that there'll be something useful there, only to find that there isn't, further adds to frustration and disappointment.
I think the game has now developed into a giant Easter egg hunt instead of a game where you can practice and hone your skills and use your experience to deal with difficult circumstances. The fact that all the hard work you did before to get what you have has been wasted because you're now levelled to the same as a new starter, where AI can wipe you out at a moments notice using their magic weapons and shields, added to the fact that there's no clear way forward in how to progress, I think that this will also cause a lot of frustration.
I can summarise to say that for those that have played a lot, it's turned into a game of hope and chance, not one where you can set your own targets and use skill, intelligence, cunning and hard work to reach them. I think that's ruined the game for many. It's a bit like your job, where you worked from 8 AM to 9 PM every day and studied at the weekend to get gradually promoted to department manager, then the big boss tells you that you have to go back to being a shop floor worker. When you ask what you have to do to get back to where you were, he tells you that it might happen if you work hard and hope. You ask him if there's anything specific you can concentrate on to get promoted again. You get the answer, no. Then you look around at your colleagues and see some of them getting promoted without reason. That's how I feel with the game now. I don't think I'm the only one.