I agree with OP, I also have trouble with npcs and type 9. Seems my rate for rebuy is high lately.
Not a total noob, I know some stuff about game, but I have a feeling npc's got tougher all-around?!

Like month ago and before I was running my cargo t9 shieldless, rarely got interdicted, never lost a ship, managed to escape alive every time.
And I g5'd thrusters, fsd and distro. And engineered base hull to some point, at least g3 hd deep plating .
Some 2 weeks ago I started to get rebuys. Ok, put some 5a shields, thinking that should do it, but elite anacondas just teared me apart. One time while I was talking to another cmdr about it, got interdicted by python, submited and the npc blasted me with packhounds(?!) in like 8 seconds... I couldn't belive this, my fsd didn't cool down before rebuy screen.
If they made npc's more dangerous in last update, great, I'm down with that, we need that.
But on the other side it seems that type 9 became unusable in its core purpose, hauling big cargo in more less relaxed manor. I mean it's hauling, right?! Not those level 7 signals or high cz's or thargoids, right?!
Sure, you can g5'd it, lots of game tricks can be applied here, but sometimes I just want to haul some stuff for bgs or credits, and I want to have a chance of doing it relaxed as a slow paced activity.
So after 5-7 rebuys in like 10 runs, I parked my type 9.
Don't have rank for Cutter yet, but it seems I will need to do it. Because Cutter with same engineering like my t9, will just lose npc's, even without shields.
That makes me sad, because I want to use t9 as a general big hauler. That sounds more right to me than doing same thing in Cutter.
Because purpose of t9 is HAULING, right?!