Not sure since before engineering I had only a hand full of ships. The way I see it with or without engineering A-rated is the only and best to use except if you do high range jump stuff where you need to be lighter. So basically engineering is the step after A-Rated ship.
When I started Engineering I found I have everything to do 1-3 level upgrades but 4 I had only a few and most of 5 level upgrades I needed to grind the items for. I do not own even 1 ship that is fully engineered with max level 5 upgrades on everything.
The idea of Engenierign seems to be to extend game play in return to get more of what you need for your ship by modifying the modals to whatever you need them do have more and have less of. If anything I find it's the only last good change to the game since it opens the possibilities for new builds. But yes it mainly just makes stronger PVP opponents that have superior offence and deffence.
I'm the same. I had the Sidewinder of course, a free iEagle and Cobra MkIII due to my original pledge level. Never really flew the Cobra at the time as is felt like too much of a leg-up starting the game. Back then the Hauler and Adder did not exist, so I went Viper then a Type 6 for trade and finally Asp Explorer. I got the Vulture early last year, but really wasn't playing much, then had a long break. Both the Type 7 and Python are very new acquisitions.
Initially, I too appeared to have materials for the most basic tier one items with Felicity Farseers. So, I've upgraded FSD's, Thrusters, Power Plants and Shield Boosters, but only to low levels. I think I have one tier 3 FSD upgrade, but I didn't know what I was doing at the time lol. So, yeah, currently its materials holding me back.
Scoob.