I think you mentioned what to avoid already. More experienced folks may add but that’s the nutshell version. And that’s just my opinion. I’m not a mechanic. Long time user and abuser.
And in that regard I can report I/we have had much success with the third generation Legacys.
Personal preference is first gen but I can see where you’re daughter would gag at the thought.
We currently have two third gen Legacys and one fourth gen “Outback” Legacy. They’re all ok but the more new the more difficult for the backyard guy to work on - and I think you’ll hear that option repeated.
Praise to your wise daughter.