Engineering killed it for me as well. Getting a VR headset kicked the game back off again for me though, and whilst I can't go playing solo in haz res and the worst combat zones like I used to I have been having fun again. Unlocking some basic engineering upgrades for an FSD boost on my ships wasn't that hard in the end, though getting the top level upgrades is more grind than I can face. Sounds like they will be doing something about that.
Doing a Hi-Res in a system with decent security seems to get me the level of dogfight fun I was missing from before. You are assisting police ships there, but it is easy to end up over extending so there is plenty of risk if you push.
I think my main change since pre engineering is that I run with bigger shields now on my trading ships.
How much is the Chieftain? Did some passenger runs in the Python over the weekend, the one where you pick up a load of passenger missions and then spend half an hour in supercruise getting to a station that is 1.8M ls from the beacon, then drop the passengers off for 50M to 100M credits. Yeah that sounds dull, but I had a book (Altered Carbon) I wanted to read and the credits are handy when new ships come along